/* =========================================================
   诸子百家 · 思想星河  |  暗色沉浸风
   ========================================================= */

:root {
  --bg: #0a0c12;
  --bg-soft: #10131c;
  --bg-card: rgba(255, 255, 255, 0.035);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);

  --ink: #eef1f7;
  --ink-soft: #b6bccb;
  --ink-mute: #7a8296;

  --gold: #e6b45c;
  --gold-soft: #f0cd8c;
  --jade: #5ec8c8;
  --accent: var(--gold);

  --radius: 18px;
  --radius-lg: 26px;
  --shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.7);
  --maxw: 1180px;

  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景层 ------------------------------------------------- */
#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(1200px 600px at 15% -5%, rgba(230, 180, 92, 0.10), transparent 60%),
    radial-gradient(1000px 700px at 100% 10%, rgba(94, 200, 200, 0.08), transparent 55%),
    radial-gradient(900px 900px at 50% 120%, rgba(143, 155, 216, 0.07), transparent 60%);
  pointer-events: none;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

main, .nav, .footer { position: relative; z-index: 2; }

/* 通用 --------------------------------------------------- */
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 120px 24px;
}
.section--alt { position: relative; }
.section--alt::before {
  content: "";
  position: absolute;
  inset: 0 -50vw;
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.02) 20%, rgba(255,255,255,0.02) 80%, transparent);
  z-index: -1;
}

.section__head { text-align: center; max-width: 640px; margin: 0 auto 64px; }
.section__kicker {
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--gold);
  font-weight: 600;
  margin-bottom: 16px;
}
.section__title {
  font-family: var(--serif);
  font-size: clamp(28px, 4.5vw, 46px);
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(180deg, #fff, #cfd4e0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section__desc { color: var(--ink-soft); margin-top: 16px; font-size: 16px; }

/* 揭示动画 */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(.16,1,.3,1), transform 0.8s cubic-bezier(.16,1,.3,1);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* 按钮 --------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .3s, box-shadow .3s, background .3s, border-color .3s;
}
.btn--primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  color: #1a1206;
  box-shadow: 0 12px 30px -10px rgba(230,180,92,0.6);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -10px rgba(230,180,92,0.75); }
.btn--ghost { border-color: var(--line-strong); color: var(--ink); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-3px); }

/* 导航 --------------------------------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 48px);
  transition: background .4s, backdrop-filter .4s, padding .4s, border-color .4s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(10, 12, 18, 0.72);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
  padding-top: 12px;
  padding-bottom: 12px;
}
.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__seal {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  font-family: var(--serif);
  font-size: 20px;
  color: #1a1206;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  box-shadow: 0 6px 18px -6px rgba(230,180,92,0.6);
}
.nav__title { font-family: var(--serif); font-size: 20px; letter-spacing: 0.14em; font-weight: 700; }
.nav__links { display: flex; gap: 34px; }
.nav__links a {
  font-size: 15px;
  color: var(--ink-soft);
  position: relative;
  transition: color .3s;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: var(--gold);
  transition: width .3s;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__toggle span {
  width: 24px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero --------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}
.hero__glow {
  position: absolute;
  width: 720px; height: 720px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(230,180,92,0.18), transparent 62%);
  filter: blur(20px);
  animation: floaty 12s ease-in-out infinite;
  z-index: 0;
}
@keyframes floaty {
  0%,100% { transform: translateY(-14px) scale(1); }
  50% { transform: translateY(16px) scale(1.06); }
}
.hero__inner { position: relative; z-index: 1; max-width: 860px; }
.hero__eyebrow {
  font-size: 13px;
  letter-spacing: 0.34em;
  color: var(--gold);
  margin-bottom: 26px;
  font-weight: 500;
}
.hero__title {
  font-family: var(--serif);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.03em;
  margin-bottom: 30px;
}
.hero__title-line {
  display: block;
  font-size: clamp(44px, 10vw, 104px);
}
.hero__title-line--accent {
  background: linear-gradient(120deg, var(--gold-soft) 0%, var(--gold) 40%, var(--jade) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__lede {
  font-size: clamp(15px, 2vw, 19px);
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 auto 40px;
  font-family: var(--serif);
}
.hero__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 68px; }
.hero__stats {
  display: flex;
  gap: clamp(30px, 8vw, 88px);
  justify-content: center;
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; align-items: center; }
.stat__num {
  font-family: var(--serif);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
}
.stat__label { font-size: 13px; color: var(--ink-mute); margin-top: 10px; letter-spacing: 0.08em; }

.hero__scroll {
  position: absolute;
  bottom: 34px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 44px;
  border: 2px solid var(--line-strong);
  border-radius: 14px;
  z-index: 1;
}
.hero__scroll span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  background: var(--gold);
  border-radius: 2px;
  animation: scrolldot 1.8s ease-in-out infinite;
}
@keyframes scrolldot {
  0% { opacity: 0; transform: translateY(0); }
  40% { opacity: 1; }
  80%,100% { opacity: 0; transform: translateY(16px); }
}

/* 流派筛选 ---------------------------------------------- */
.filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 48px;
}
.filter__btn {
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--ink-soft);
  font-size: 14px;
  cursor: pointer;
  transition: all .3s;
}
.filter__btn:hover { border-color: var(--line-strong); color: var(--ink); }
.filter__btn.is-active {
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  border-color: transparent;
  color: #1a1206;
  font-weight: 600;
}

/* 流派卡片 ---------------------------------------------- */
.schools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 22px;
}
.school-card {
  position: relative;
  padding: 30px 28px 28px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--line);
  overflow: hidden;
  cursor: pointer;
  transition: transform .4s cubic-bezier(.16,1,.3,1), border-color .4s, background .4s;
}
.school-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 200px at 100% 0, var(--c, var(--gold)), transparent 55%);
  opacity: 0.12;
  transition: opacity .4s;
}
.school-card:hover {
  transform: translateY(-8px);
  border-color: color-mix(in srgb, var(--c, var(--gold)) 50%, transparent);
  background: var(--bg-card-hover);
}
.school-card:hover::before { opacity: 0.24; }
.school-card__glyph {
  position: relative;
  font-family: var(--serif);
  font-size: 54px;
  font-weight: 800;
  color: var(--c, var(--gold));
  line-height: 1;
  margin-bottom: 18px;
  text-shadow: 0 8px 30px color-mix(in srgb, var(--c, var(--gold)) 45%, transparent);
}
.school-card__name {
  position: relative;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.school-card__en {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  font-family: var(--sans);
  text-transform: uppercase;
}
.school-card__tag {
  position: relative;
  color: var(--c, var(--gold));
  font-size: 14px;
  margin: 8px 0 14px;
  font-family: var(--serif);
}
.school-card__summary {
  position: relative;
  color: var(--ink-soft);
  font-size: 14.5px;
  margin-bottom: 20px;
}
.school-card__ideas { position: relative; display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  background: rgba(255,255,255,0.02);
}
.school-card__more {
  position: relative;
  margin-top: 20px;
  font-size: 13px;
  color: var(--c, var(--gold));
  display: inline-flex;
  align-items: center;
  gap: 6px;
  opacity: 0.85;
}
.school-card__more::after { content: "→"; transition: transform .3s; }
.school-card:hover .school-card__more::after { transform: translateX(5px); }

/* 人物·名言 --------------------------------------------- */
.figures {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
}
.figure-card {
  position: relative;
  padding: 30px 28px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--line);
  transition: transform .4s, border-color .4s;
  overflow: hidden;
}
.figure-card:hover { transform: translateY(-6px); border-color: color-mix(in srgb, var(--c) 45%, transparent); }
.figure-card__quote {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 22px;
  position: relative;
  padding-top: 26px;
}
.figure-card__quote::before {
  content: "“";
  position: absolute;
  top: -14px; left: -6px;
  font-family: var(--serif);
  font-size: 64px;
  color: var(--c);
  opacity: 0.32;
  line-height: 1;
}
.figure-card__meta { display: flex; align-items: center; gap: 14px; border-top: 1px solid var(--line); padding-top: 18px; }
.figure-card__avatar {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  color: #10131c;
  background: linear-gradient(135deg, var(--c), color-mix(in srgb, var(--c) 60%, #fff));
  flex-shrink: 0;
}
.figure-card__name { font-family: var(--serif); font-size: 17px; font-weight: 700; }
.figure-card__title { font-size: 12.5px; color: var(--ink-mute); }
.figure-card__source { margin-left: auto; text-align: right; font-size: 12px; color: var(--c); white-space: nowrap; }
.figure-card__life { font-size: 11px; color: var(--ink-mute); }

/* 时间线 ------------------------------------------------- */
.timeline {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding-left: 8px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 26px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--gold), var(--jade), transparent);
  opacity: 0.5;
}
.tl-item {
  position: relative;
  padding: 0 0 42px 74px;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-item__dot {
  position: absolute;
  left: 18px; top: 4px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 5px rgba(230,180,92,0.12);
}
.tl-item__dot::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--gold);
}
.tl-item__year {
  display: inline-block;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.05em;
}
.tl-item__era {
  font-size: 11px;
  color: var(--ink-mute);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 10px;
  margin-left: 10px;
}
.tl-item__title { font-family: var(--serif); font-size: 20px; font-weight: 700; margin: 8px 0 6px; }
.tl-item__text { color: var(--ink-soft); font-size: 14.5px; }

/* 关于 --------------------------------------------------- */
.about {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 980px;
  margin: 0 auto;
}
.about__text .section__title { text-align: left; margin-bottom: 22px; }
.about__text p { color: var(--ink-soft); margin-bottom: 16px; font-size: 16px; }
.about__quote {
  font-family: var(--serif);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.7;
  color: var(--gold-soft);
  padding: 40px 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(230,180,92,0.08), rgba(94,200,200,0.05));
  position: relative;
}
.about__quote cite {
  display: block;
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-mute);
  font-style: normal;
}

/* 页脚 --------------------------------------------------- */
.footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
}
.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer__brand { font-family: var(--serif); font-size: 17px; letter-spacing: 0.1em; }
.footer__note { color: var(--ink-mute); font-size: 14px; }

/* 弹层 --------------------------------------------------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal.is-open { display: flex; }
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 6, 10, 0.72);
  backdrop-filter: blur(6px);
  animation: fade .3s ease;
}
.modal__panel {
  position: relative;
  width: min(640px, 100%);
  max-height: 86vh;
  overflow-y: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #14171f, #0d1016);
  box-shadow: var(--shadow);
  animation: pop .4s cubic-bezier(.16,1,.3,1);
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes pop { from { opacity: 0; transform: translateY(30px) scale(.96); } to { opacity: 1; transform: none; } }
.modal__close {
  position: absolute;
  top: 18px; right: 18px;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.04);
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 15px;
  transition: all .3s;
  z-index: 2;
}
.modal__close:hover { color: var(--ink); border-color: var(--line-strong); transform: rotate(90deg); }
.modal__body { padding: 44px 40px 40px; }

.md-head { display: flex; align-items: center; gap: 18px; margin-bottom: 22px; }
.md-glyph {
  width: 72px; height: 72px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 800;
  color: #10131c;
  background: linear-gradient(135deg, var(--c), color-mix(in srgb, var(--c) 55%, #fff));
  flex-shrink: 0;
}
.md-name { font-family: var(--serif); font-size: 30px; font-weight: 800; }
.md-en { font-size: 12px; letter-spacing: 0.2em; color: var(--ink-mute); text-transform: uppercase; }
.md-tag { color: var(--c); font-family: var(--serif); font-size: 17px; margin-bottom: 22px; }
.md-detail { color: var(--ink-soft); font-size: 15.5px; line-height: 1.85; margin-bottom: 26px; }
.md-block { margin-bottom: 22px; }
.md-block h4 {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.md-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.md-tags .chip { border-color: color-mix(in srgb, var(--c) 30%, transparent); color: var(--ink); }

/* 响应式 ------------------------------------------------- */
@media (max-width: 860px) {
  .section { padding: 90px 20px; }
  .about { grid-template-columns: 1fr; gap: 34px; }
  .nav__links {
    position: fixed;
    inset: 66px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: rgba(10,12,18,0.96);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    padding: 10px 0;
    transform: translateY(-120%);
    transition: transform .4s cubic-bezier(.16,1,.3,1);
  }
  .nav.is-open .nav__links { transform: none; }
  .nav__links a { padding: 14px 28px; }
  .nav__toggle { display: flex; }
  .modal__body { padding: 40px 24px 30px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  [data-reveal] { opacity: 1; transform: none; }
}