/* ==========================================================
   林一舟 · 个人主页 — 简约科技风
   ========================================================== */
:root {
  --bg: #07080d;
  --bg-soft: #0c0e16;
  --card: rgba(255, 255, 255, .045);
  --border: rgba(255, 255, 255, .09);
  --text: #e9ebf4;
  --muted: #98a0b6;
  --accent: #22d3ee;   /* 青色 */
  --accent2: #818cf8;  /* 靛紫 */
  --grad: linear-gradient(120deg, var(--accent), var(--accent2));
  --radius: 18px;
  --nav-h: 68px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(34, 211, 238, .3); }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, li, dl, dd { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ---------- 全局氛围背景：极光光晕 + 网格 ---------- */
body::before,
body::after {
  content: "";
  position: fixed;
  z-index: -1;
  border-radius: 50%;
  filter: blur(110px);
  opacity: .22;
  pointer-events: none;
}
body::before {
  width: 55vw; height: 55vw; top: -18vw; right: -14vw;
  background: radial-gradient(circle, #22d3ee 0%, transparent 62%);
  animation: drift 26s ease-in-out infinite alternate;
}
body::after {
  width: 48vw; height: 48vw; bottom: -16vw; left: -12vw;
  background: radial-gradient(circle, #6366f1 0%, transparent 62%);
  animation: drift 32s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(-5vw, 6vw, 0) scale(1.15); }
}
.grid-bg {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 40%, transparent 100%);
}

.container { width: min(1120px, 92%); margin-inline: auto; }

/* ---------- 顶部进度条 ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0; right: 0; height: 2.5px;
  background: var(--grad);
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 200;
}

/* ---------- 鼠标氛围光斑 ---------- */
.cursor-glow {
  position: fixed; top: 0; left: 0; z-index: 1;
  width: 480px; height: 480px; margin: -240px 0 0 -240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34,211,238,.09) 0%, rgba(129,140,248,.05) 35%, transparent 65%);
  pointer-events: none;
  transition: opacity .4s;
  opacity: 0;
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding-inline: max(4vw, 20px);
  transition: background .35s, backdrop-filter .35s, border-color .35s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(7, 8, 13, .72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-color: var(--border);
}
.logo {
  font-weight: 800; font-size: 19px; letter-spacing: .04em;
}
.logo span {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.nav-list { display: flex; gap: 6px; }
.nav-list a {
  position: relative;
  padding: 8px 14px;
  color: var(--muted);
  font-size: 15px;
  border-radius: 999px;
  transition: color .25s, background .25s;
}
.nav-list a:hover { color: var(--text); background: rgba(255,255,255,.05); }
.nav-list a.active { color: var(--text); }
.nav-list a.active::after {
  content: "";
  position: absolute; left: 50%; bottom: 2px;
  width: 18px; height: 2.5px; border-radius: 2px;
  transform: translateX(-50%);
  background: var(--grad);
}
.burger {
  display: none;
  flex-direction: column; gap: 5px;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  background: none; border: 1px solid var(--border); border-radius: 10px;
}
.burger span {
  width: 17px; height: 2px; border-radius: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s;
}
.burger.open span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.burger.open span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column;
  justify-content: center;
  padding-top: var(--nav-h);
}
#particles {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%;
}
.hero-inner { position: relative; z-index: 2; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; letter-spacing: .18em;
  color: var(--accent);
  padding: 7px 16px;
  border: 1px solid rgba(34, 211, 238, .35);
  border-radius: 999px;
  background: rgba(34, 211, 238, .07);
}
.hero h1 {
  margin-top: 22px;
  font-size: clamp(38px, 7vw, 72px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.18;
}
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.hero-typing {
  margin-top: 14px;
  font-size: clamp(17px, 2.6vw, 23px);
  color: var(--muted);
  min-height: 1.8em;
}
#typed { color: var(--text); font-weight: 600; }
.caret {
  display: inline-block;
  width: 2.5px; height: 1.15em;
  margin-left: 3px; vertical-align: -0.18em;
  background: var(--accent);
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  max-width: 560px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 15.5px;
}
.hero-actions {
  margin-top: 34px;
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  transition: transform .25s var(--ease), box-shadow .25s, background-position .4s, border-color .25s, color .25s;
  will-change: transform;
}
.btn-primary {
  color: #06121a;
  background: var(--grad);
  background-size: 180% 180%;
  box-shadow: 0 8px 28px rgba(34, 211, 238, .22);
}
.btn-primary:hover {
  transform: translateY(-2px);
  background-position: 90% 50%;
  box-shadow: 0 12px 34px rgba(129, 140, 248, .3);
}
.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, .03);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, .5);
  box-shadow: 0 8px 24px rgba(34, 211, 238, .12);
}
.btn-block { width: 100%; justify-content: center; }

.hero-socials {
  margin-top: 36px;
  display: flex; gap: 10px; justify-content: center;
}
.hero-socials a {
  display: grid; place-items: center;
  width: 44px; height: 44px;
  border: 1px solid var(--border);
  border-radius: 13px;
  color: var(--muted);
  background: rgba(255, 255, 255, .03);
  transition: color .25s, border-color .25s, transform .25s var(--ease), box-shadow .25s;
}
.hero-socials a:hover {
  color: var(--accent);
  border-color: rgba(34, 211, 238, .45);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(34, 211, 238, .14);
}

.hero-stats {
  margin: 46px auto 0;
  display: inline-grid;
  grid-template-columns: repeat(3, auto);
  gap: clamp(28px, 6vw, 64px);
  text-align: center;
}
.hero-stats dt {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}
.hero-stats dd { color: var(--muted); font-size: 13.5px; }

.scroll-hint {
  position: absolute; left: 50%; bottom: 26px; translate: -50% 0;
  z-index: 2;
  color: var(--muted);
  animation: bounce 2.2s infinite;
  opacity: .8;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ---------- 区块通用 ---------- */
.section { padding: clamp(80px, 11vw, 130px) 0; position: relative; }
.section-alt {
  background:
    linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,0)),
    var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-tag {
  font-size: 12.5px; letter-spacing: .22em;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(27px, 4.2vw, 42px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.3;
  margin-bottom: clamp(34px, 5vw, 54px);
}
.glass {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* 滚动显现动画 */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s var(--ease) var(--d, 0s),
              transform .7s var(--ease) var(--d, 0s);
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}
.portrait { overflow: hidden; padding: 14px; transition: border-color .3s, box-shadow .3s; }
.portrait:hover { border-color: rgba(34,211,238,.4); box-shadow: 0 18px 44px rgba(0,0,0,.35); }
.portrait img {
  border-radius: calc(var(--radius) - 8px);
  aspect-ratio: 1; object-fit: cover;
  filter: saturate(1.05);
}
.portrait figcaption {
  padding-top: 12px; text-align: center; font-weight: 600;
}
.portrait figcaption small { color: var(--muted); font-weight: 400; }
.about-copy p { color: var(--muted); margin-bottom: 16px; font-size: 15.5px; }
.about-copy strong { color: var(--text); }
.info-list { margin-top: 24px; display: grid; gap: 12px; }
.info-list li {
  display: flex; align-items: center; gap: 14px;
  padding: 11px 16px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14.5px;
  transition: border-color .25s, transform .25s var(--ease);
}
.info-list li:hover { border-color: rgba(34,211,238,.35); transform: translateX(4px); }
.info-list li span {
  flex-shrink: 0;
  font-size: 12px; letter-spacing: .08em;
  color: var(--accent);
  padding: 2px 10px;
  border: 1px solid rgba(34,211,238,.3);
  border-radius: 999px;
}
.dot-ok {
  width: 8px; height: 8px; border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 0 rgba(52, 211, 153, .5);
  animation: pulse 2s infinite;
  display: inline-block; margin-right: 6px;
}
@keyframes pulse {
  70% { box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

/* ---------- 技能 ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(28px, 5vw, 60px);
  align-items: start;
}
.skill-bars { padding: clamp(22px, 3vw, 34px); display: grid; gap: 22px; }
.bar-head {
  display: flex; justify-content: space-between;
  font-size: 14.5px; margin-bottom: 9px;
}
.bar-head b { color: var(--accent); font-variant-numeric: tabular-nums; }
.bar {
  height: 7px; border-radius: 99px;
  background: rgba(255,255,255,.07);
  overflow: hidden;
}
.bar i {
  display: block; height: 100%; width: 0;
  border-radius: 99px;
  background: var(--grad);
  transition: width 1.2s var(--ease) .15s;
}
.skill-bars.visible .bar i { width: var(--w); }

.chip-group-label {
  font-size: 12.5px; letter-spacing: .14em;
  color: var(--muted);
  margin-bottom: 10px;
}
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.chip {
  padding: 8px 16px;
  font-size: 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,.03);
  color: var(--muted);
  transition: color .25s, border-color .25s, transform .25s var(--ease), box-shadow .25s;
}
.chip:hover {
  color: var(--text);
  border-color: rgba(34,211,238,.45);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(34,211,238,.1);
}
.chip.hot { color: var(--accent); border-color: rgba(34,211,238,.35); }

/* ---------- 项目 ---------- */
.filter {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 34px;
}
.filter-btn {
  padding: 9px 22px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  font-size: 14px;
  transition: all .25s var(--ease);
}
.filter-btn:hover { color: var(--text); border-color: rgba(34,211,238,.4); }
.filter-btn.active {
  color: #06121a;
  background: var(--grad);
  border-color: transparent;
  font-weight: 600;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(430px, 100%), 1fr));
  gap: 26px;
}
.project-card {
  position: relative;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  overflow: hidden;
  transform-style: preserve-3d;
  transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform .18s ease-out, border-color .3s, box-shadow .3s, opacity .4s;
}
.project-card.hide { display: none; }
.project-card.show-anim { animation: cardIn .45s var(--ease); }
@keyframes cardIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
.project-card::after { /* 跟随鼠标的高光 */
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(520px circle at var(--mx, 50%) var(--my, 50%), rgba(34,211,238,.1), transparent 45%);
  opacity: 0;
  transition: opacity .35s;
  pointer-events: none;
}
.project-card:hover::after { opacity: 1; }
.project-card:hover { border-color: rgba(34,211,238,.4); box-shadow: 0 22px 48px rgba(0,0,0,.4); }

.card-media { overflow: hidden; }
.card-media img {
  aspect-ratio: 4 / 3; object-fit: cover; width: 100%;
  filter: saturate(1.05) brightness(.96);
  transition: transform .7s var(--ease);
}
.project-card:hover .card-media img { transform: scale(1.06); }
.card-body { padding: 22px 24px 26px; }
.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.card-tags span {
  font-size: 12px; color: var(--accent);
  padding: 3px 10px;
  border: 1px solid rgba(34,211,238,.28);
  border-radius: 999px;
  background: rgba(34,211,238,.06);
}
.card-body h3 { font-size: 20px; margin-bottom: 8px; }
.card-body p { color: var(--muted); font-size: 14.5px; margin-bottom: 16px; }
.link-more {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 14px; font-weight: 600; color: var(--accent);
  transition: gap .25s var(--ease);
}
.link-more:hover { gap: 10px; }

/* ---------- 联系 ---------- */
.contact-sub {
  color: var(--muted);
  max-width: 520px;
  margin: -20px 0 44px;
  font-size: 15.5px;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 26px;
  align-items: start;
}
.contact-form { padding: clamp(22px, 3.4vw, 34px); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label {
  display: block; margin-bottom: 16px;
  font-size: 13.5px; color: var(--muted);
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 8px;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.25);
  color: var(--text);
  font-family: inherit; font-size: 14.5px;
  resize: vertical;
  transition: border-color .25s, box-shadow .25s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: rgba(34,211,238,.55);
  box-shadow: 0 0 0 3px rgba(34,211,238,.12);
}
.form-note { margin-top: 12px; font-size: 12.5px; color: var(--muted); opacity: .7; }
.contact-side { display: grid; gap: 20px; }
.side-card { padding: 22px 24px; }
.side-label {
  font-size: 12.5px; letter-spacing: .16em;
  color: var(--accent);
  margin-bottom: 12px;
}
.email-copy {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 17px; font-weight: 700;
  color: var(--text);
  background: none; border: none;
  padding: 0;
  border-bottom: 1.5px dashed rgba(34,211,238,.4);
  padding-bottom: 3px;
  transition: color .25s;
}
.email-copy:hover { color: var(--accent); }
.email-copy svg { opacity: .7; }
.side-links { display: grid; gap: 10px; }
.side-links a {
  color: var(--muted); font-size: 14.5px;
  transition: color .25s, transform .25s var(--ease);
  display: inline-block;
}
.side-links a:hover { color: var(--text); transform: translateX(4px); }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  font-size: 13.5px; color: var(--muted);
  display: flex; align-items: center; justify-content: center;
  gap: 20px;
}
.footer p { text-align: center; }
.back-top {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--muted);
  backdrop-filter: blur(10px);
  opacity: 0; visibility: hidden;
  transform: translateY(14px);
  transition: all .35s var(--ease);
  z-index: 90;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { color: var(--accent); border-color: rgba(34,211,238,.45); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%; bottom: 34px;
  transform: translate(-50%, 16px);
  padding: 12px 22px;
  border-radius: 999px;
  background: rgba(13, 15, 22, .9);
  border: 1px solid rgba(34,211,238,.4);
  color: var(--text);
  font-size: 14px;
  backdrop-filter: blur(10px);
  box-shadow: 0 14px 34px rgba(0,0,0,.45);
  opacity: 0; visibility: hidden;
  transition: all .35s var(--ease);
  z-index: 300;
  white-space: nowrap;
}
.toast.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .about-grid, .skills-grid, .contact-grid { grid-template-columns: 1fr; }
  .portrait { max-width: 340px; margin-inline: auto; }
  .br-m { display: none; }
}
@media (max-width: 720px) {
  .burger { display: flex; }
  .nav-list {
    position: absolute;
    top: var(--nav-h); left: 4vw; right: 4vw;
    flex-direction: column;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgba(10, 11, 18, .95);
    backdrop-filter: blur(16px);
    box-shadow: 0 24px 60px rgba(0,0,0,.5);
    opacity: 0; visibility: hidden;
    transform: translateY(-8px);
    transition: all .3s var(--ease);
  }
  .nav-list.open { opacity: 1; visibility: visible; transform: none; }
  .field-row { grid-template-columns: 1fr; }
  .cursor-glow, .scroll-hint { display: none; }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  body::before, body::after, .cursor-glow { display: none; }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================
   多页结构：入口大页 / 二级页 / 三级详情页
   ========================================================== */

/* 页面载入淡入 */
.page-enter { animation: pageIn .55s var(--ease); }
@keyframes pageIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 入口大页（Hub） ---------- */
.top-meta {
  font-size: 10.5px;
  letter-spacing: .18em;
  line-height: 1.6;
  text-align: right;
  color: var(--muted);
}
.hub {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column;
  padding-top: var(--nav-h);
}
.hub-inner {
  position: relative; z-index: 2;
  flex: 1;
  width: min(1120px, 92%);
  margin-inline: auto;
  text-align: center;
  padding-block: clamp(30px, 5vh, 64px) 28px;
}
.hub-name {
  margin-top: 20px;
  font-size: clamp(58px, 11vw, 116px);
  font-weight: 900;
  letter-spacing: .04em;
  line-height: 1.12;
}
.hub-name span {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.hero-typing em { font-style: normal; color: var(--accent); margin-inline: 2px; }

.entry-grid {
  margin: clamp(34px, 4.6vh, 54px) auto 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1040px;
  text-align: left;
}
.entry {
  position: relative;
  display: flex; flex-direction: column;
  gap: 12px;
  min-height: 178px;
  padding: 22px 22px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s, background .3s;
}
.entry::after { /* 光标高光 */
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(34,211,238,.13), transparent 50%);
  opacity: 0;
  transition: opacity .35s;
  pointer-events: none;
}
.entry:hover::after { opacity: 1; }
.entry:hover {
  transform: translateY(-5px);
  border-color: rgba(34,211,238,.45);
  box-shadow: 0 18px 40px rgba(0,0,0,.38);
}
.entry > svg { color: var(--accent); }
.entry-num {
  position: absolute; top: 16px; right: 18px;
  font-size: 12px; letter-spacing: .14em;
  color: var(--muted); opacity: .7;
  font-variant-numeric: tabular-nums;
}
.entry h2 {
  margin-top: auto;
  font-size: 19px; font-weight: 700;
  display: flex; align-items: baseline; gap: 8px;
}
.entry h2 em {
  font-style: normal;
  font-size: 11.5px; letter-spacing: .12em;
  color: var(--muted); font-weight: 500;
}
.entry p { font-size: 13px; color: var(--muted); line-height: 1.6; }
.entry-arrow {
  position: absolute; right: 16px; bottom: 14px;
  color: var(--accent);
  opacity: 0;
  transform: translate(-6px, 6px);
  transition: opacity .3s, transform .3s var(--ease);
}
.entry:hover .entry-arrow { opacity: 1; transform: none; }

.hub-stats { margin-top: clamp(28px, 4vh, 44px) !important; }

.hub-footer {
  position: relative; z-index: 2;
  text-align: center;
  padding: 18px 0 22px;
  font-size: 12.5px; color: var(--muted);
}

@media (max-width: 960px) {
  .entry-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .entry-grid { grid-template-columns: 1fr; }
  .entry { min-height: 0; padding-bottom: 42px; }
  .top-meta { display: none; }
}

/* ---------- 二级/三级页公共 ---------- */
.page-main {
  padding-top: calc(var(--nav-h) + clamp(36px, 6vh, 72px));
  min-height: calc(100svh - 90px);
  padding-bottom: clamp(60px, 8vw, 110px);
}
.sub-hero { text-align: center; }
.sub-title {
  font-size: clamp(32px, 5.4vw, 52px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.25;
  margin-bottom: 14px;
}
.sub-desc { color: var(--muted); font-size: 15.5px; max-width: 600px; margin-inline: auto; }
.sub-body { margin-top: clamp(40px, 6vw, 72px); }
.sub-body-narrow { margin-top: clamp(48px, 7vw, 88px); width: min(880px, 92%); margin-inline: auto; }
.block-title {
  font-size: clamp(21px, 3vw, 27px);
  font-weight: 800;
  margin-bottom: 26px;
  display: flex; align-items: baseline; gap: 10px;
}
.block-title em {
  font-style: normal;
  font-size: 12px; letter-spacing: .2em;
  color: var(--accent); font-weight: 600;
}

/* 时间线（关于页） */
.timeline { position: relative; display: grid; gap: 26px; padding-left: 26px; }
.timeline::before {
  content: "";
  position: absolute; left: 5px; top: 6px; bottom: 6px;
  width: 1.5px;
  background: linear-gradient(180deg, var(--accent), var(--accent2), transparent);
}
.timeline li { position: relative; }
.timeline li::before {
  content: "";
  position: absolute; left: -26px; top: 9px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg);
  border: 2.5px solid var(--accent);
  box-shadow: 0 0 12px rgba(34,211,238,.6);
}
.timeline b {
  display: block;
  font-size: 12.5px; letter-spacing: .08em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.timeline span { display: block; font-weight: 700; font-size: 16.5px; margin: 3px 0; }
.timeline li { color: var(--muted); font-size: 14.5px; }
.timeline li b, .timeline li span { color: inherit; }
.timeline li b { color: var(--accent); }
.timeline li span { color: var(--text); }

/* 项目卡片：新增角标序号 */
.card-index {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  font-size: 12px; letter-spacing: .1em;
  color: var(--text);
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(7, 8, 13, .65);
  border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(6px);
  font-variant-numeric: tabular-nums;
}

/* ---------- 三级详情页 ---------- */
.crumb { margin-bottom: 34px; }
.crumb-back {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; color: var(--muted);
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: color .25s, border-color .25s, gap .25s;
}
.crumb-back:hover { color: var(--text); border-color: rgba(34,211,238,.45); gap: 11px; }

.detail-hero { text-align: center; }
.detail-tags {
  display: flex; justify-content: center; gap: 10px; flex-wrap: wrap;
  margin-bottom: 18px;
}
.detail-cover {
  margin-top: 34px;
  overflow: hidden;
  padding: 10px;
  transition: border-color .3s, box-shadow .3s;
}
.detail-cover:hover { border-color: rgba(34,211,238,.4); box-shadow: 0 24px 56px rgba(0,0,0,.42); }
.detail-cover img { border-radius: calc(var(--radius) - 8px); aspect-ratio: 21 / 9; object-fit: cover; width: 100%; }
.meta-strip {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  text-align: left;
  overflow: hidden;
}
.meta-strip > div { padding: 18px 22px; }
.meta-strip > div + div { border-left: 1px solid var(--border); }
.meta-strip dt { font-size: 11.5px; letter-spacing: .14em; color: var(--accent); margin-bottom: 5px; }
.meta-strip dd { font-size: 13.5px; color: var(--text); line-height: 1.55; }

.article p { color: var(--muted); font-size: 15.5px; margin-bottom: 16px; }
.article strong { color: var(--text); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(330px, 100%), 1fr));
  gap: 18px;
}
.feature {
  padding: 24px 24px 22px;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(129,140,248,.5);
  box-shadow: 0 16px 36px rgba(0,0,0,.35);
}
.feature b {
  display: inline-block;
  font-size: 12px; letter-spacing: .16em;
  color: var(--accent2);
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.feature h3 { font-size: 17.5px; margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: 14px; }

.gallery { display: grid; gap: 20px; }
.gallery figure { overflow: hidden; padding: 10px; }
.gallery img { border-radius: calc(var(--radius) - 8px); aspect-ratio: 21 / 10; object-fit: cover; width: 100%; transition: transform .6s var(--ease); }
.gallery figure:hover img { transform: scale(1.03); }
.gallery figcaption {
  text-align: center;
  padding: 12px 0 4px;
  font-size: 13px; color: var(--muted);
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.metric { text-align: center; padding: 28px 18px; }
.metric strong {
  display: block;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
}
.metric span { font-size: 13.5px; color: var(--muted); }

.pager-nav { display: flex; gap: 16px; margin-top: clamp(48px, 7vw, 80px); }
.pager-empty { flex: 1; }
.pager {
  flex: 1;
  display: flex; flex-direction: column; align-items: flex-end; gap: 6px;
  padding: 20px 24px;
  text-align: right;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.pager small { font-size: 12px; letter-spacing: .1em; color: var(--muted); }
.pager b {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 17px;
  color: var(--text);
}
.pager svg { color: var(--accent); transition: transform .3s var(--ease); }
.pager:hover { transform: translateY(-3px); border-color: rgba(34,211,238,.45); box-shadow: 0 14px 32px rgba(0,0,0,.35); }
.pager:hover svg { transform: translateX(5px); }
.pager.prev { align-items: flex-start; text-align: left; }
.pager.prev:hover svg { transform: translateX(-5px); }

@media (max-width: 720px) {
  .meta-strip { grid-template-columns: 1fr 1fr; }
  .meta-strip > div:nth-child(odd) { border-left: none; }
  .meta-strip > div:nth-child(n+3) { border-top: 1px solid var(--border); }
  .metric-row { grid-template-columns: 1fr; }
  .pager-nav { flex-direction: column; }
}