@font-face {
  font-family: "Inter Tight";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/inter-tight-400.woff2") format("woff2");
}
@font-face {
  font-family: "Inter Tight";
  font-style: normal;
  font-weight: 700 900;
  font-display: swap;
  src: url("../fonts/inter-tight-700.woff2") format("woff2");
}

:root {
  --ink: #0b0b0c;
  --ink-soft: #141416;
  --concrete: #26282c;
  --line: #2e3034;
  --gray: #6e7681;
  --paper: #e8e6e1;
  --signal: #2f6bff;

  --font-sans: "Inter Tight", "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --pad: clamp(20px, 4vw, 64px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { background: var(--ink); }

body {
  font-family: var(--font-sans);
  background: var(--ink);
  color: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  font-weight: 400;
}

body.is-loading { overflow: hidden; }

::selection { background: var(--signal); color: #fff; }

a { color: inherit; text-decoration: none; }

/* ---------- 颗粒 / 扫描线 ---------- */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 90;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 顶部导航 ---------- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px var(--pad);
  mix-blend-mode: difference;
}
.topbar__brand {
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 15px;
}
.topbar__brand span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--gray);
  margin-left: 10px;
  font-weight: 400;
}
.topbar__nav { display: flex; gap: clamp(16px, 3vw, 40px); }
.topbar__nav a {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper);
  position: relative;
  padding-bottom: 3px;
}
.topbar__nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s var(--ease);
}
.topbar__nav a:hover::after { transform: scaleX(1); transform-origin: left; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  height: 100svh;
  min-height: 620px;
  overflow: hidden;
}
#city {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.hero__fallback {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 80% at 50% 120%, #16181d 0%, #0b0b0c 60%),
    repeating-linear-gradient(90deg, transparent 0 78px, rgba(232, 230, 225, 0.03) 78px 79px);
}
.hero__inner {
  position: relative;
  z-index: 2;
  height: 100%;
  padding: 0 var(--pad) 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.hero__meta {
  position: absolute;
  top: 50%;
  right: var(--pad);
  transform: translateY(-50%) rotate(90deg);
  transform-origin: right center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--gray);
  white-space: nowrap;
}
.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gray);
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero__eyebrow::before {
  content: "";
  width: 40px;
  height: 1px;
  background: var(--signal);
}
.hero__title {
  font-size: clamp(40px, 12vw, 168px);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.045em;
  margin-bottom: 26px;
}
.hero__title em {
  font-style: normal;
  color: var(--signal);
}
.hero__sub {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.hero__sub p {
  max-width: 34ch;
  font-size: clamp(13px, 1.4vw, 16px);
  line-height: 1.75;
  color: #a8a8a3;
}
.hero__scroll {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero__scroll i {
  display: block;
  width: 1px;
  height: 34px;
  background: var(--gray);
  animation: drop 2.4s var(--ease) infinite;
  transform-origin: top;
}
@keyframes drop {
  0% { transform: scaleY(0); }
  45% { transform: scaleY(1); }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 通用区块 ---------- */
.section { padding: clamp(72px, 11vw, 160px) var(--pad); position: relative; }
.section__head {
  display: flex;
  gap: 24px;
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
  margin-bottom: clamp(40px, 6vw, 80px);
}
.section__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal);
}
.section__title {
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.03em;
}
.section__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--gray);
  text-transform: uppercase;
}

/* ---------- 宣言 ---------- */
.manifesto {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: clamp(24px, 5vw, 80px);
}
.manifesto__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gray);
  text-transform: uppercase;
}
.manifesto__body p {
  font-size: clamp(18px, 2.2vw, 30px);
  line-height: 1.55;
  letter-spacing: -0.02em;
  color: #cfcdc8;
  margin-bottom: 1em;
  max-width: 28ch;
}
.manifesto__body p:last-child { margin-bottom: 0; }
.manifesto__body strong { color: var(--paper); font-weight: 700; }

/* ---------- 数字 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.stat {
  padding: 30px 0 6px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat__num {
  font-size: clamp(38px, 5.6vw, 76px);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat__num sup { font-size: 0.34em; vertical-align: super; color: var(--gray); margin-left: 4px; letter-spacing: 0; }
.stat__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--gray);
  text-transform: uppercase;
  margin-top: 12px;
}

/* ---------- 校区列表 ---------- */
.campus-list { border-top: 1px solid var(--line); }
.campus-row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) 40px;
  align-items: center;
  gap: 20px;
  padding: clamp(22px, 3vw, 34px) 12px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background 0.5s var(--ease), padding 0.5s var(--ease);
}
.campus-row:hover { background: var(--ink-soft); padding-left: 26px; }
.campus-row__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gray);
  letter-spacing: 0.1em;
}
.campus-row__name {
  font-size: clamp(20px, 2.6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.03em;
  transition: color 0.4s var(--ease);
}
.campus-row:hover .campus-row__name { color: #fff; }
.campus-row__district,
.campus-row__courses {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gray);
}
.campus-row__courses span { color: #8f9481; }
.campus-row__arrow {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gray);
  transition: transform 0.5s var(--ease), color 0.4s var(--ease);
}
.campus-row:hover .campus-row__arrow { transform: translateX(6px); color: var(--signal); }

/* ---------- 课程 ---------- */
.courses {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.course {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(24px, 3vw, 40px);
  min-height: 220px;
  display: flex;
  flex-direction: column;
  transition: background 0.5s var(--ease);
}
.course:hover { background: var(--ink-soft); }
.course__en {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--signal);
  margin-bottom: auto;
}
.course__cn {
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 26px 0 10px;
}
.course__desc { font-size: 13px; line-height: 1.7; color: #9a9a95; max-width: 30ch; }

/* ---------- CTA ---------- */
.cta { border-top: 1px solid var(--line); }
.cta__title {
  font-size: clamp(38px, 8vw, 120px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.045em;
  margin-bottom: clamp(32px, 5vw, 56px);
}
.cta__row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 34px;
  border: 1px solid var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: background 0.45s var(--ease), color 0.45s var(--ease);
}
.btn:hover { background: var(--paper); color: var(--ink); }
.btn--signal { background: var(--signal); border-color: var(--signal); color: #fff; }
.btn--signal:hover { background: #1f56e0; border-color: #1f56e0; color: #fff; }

/* ---------- 页脚 ---------- */
.footer {
  padding: 40px var(--pad);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--gray);
  text-transform: uppercase;
}

/* ---------- 校区详情页 ---------- */
.detail-top { padding: clamp(110px, 16vw, 190px) var(--pad) 0; }
.detail__back {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gray);
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 40px;
  transition: color 0.3s;
}
.detail__back:hover { color: var(--paper); }
.detail__title {
  font-size: clamp(46px, 9vw, 132px);
  font-weight: 700;
  line-height: 0.88;
  letter-spacing: -0.045em;
  margin-bottom: 18px;
}
.detail__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gray);
  text-transform: uppercase;
}
.detail__note {
  font-size: clamp(16px, 1.8vw, 21px);
  line-height: 1.75;
  color: #cfcdc8;
  max-width: 46ch;
  margin: clamp(36px, 5vw, 60px) 0;
}
.meta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.meta-grid > div {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 24px 20px;
}
.meta-grid dt {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--gray);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.meta-grid dd { font-size: 15px; letter-spacing: -0.01em; line-height: 1.5; }
.meta-grid dd a:hover { color: var(--signal); }

.map {
  position: relative;
  height: clamp(240px, 34vw, 380px);
  border: 1px solid var(--line);
  margin-top: clamp(40px, 6vw, 72px);
  overflow: hidden;
  background-color: #101113;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 44px 44px;
  background-position: center;
}
.map__pin {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--signal);
  transform: translate(-50%, -50%);
}
.map__pin::after {
  content: "";
  position: absolute;
  inset: -18px;
  border: 1px solid var(--signal);
  border-radius: 50%;
  animation: pulse 2.6s var(--ease) infinite;
}
@keyframes pulse {
  0% { transform: scale(0.4); opacity: 1; }
  100% { transform: scale(1.6); opacity: 0; }
}
.map__label {
  position: absolute;
  left: 16px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--gray);
  text-transform: uppercase;
}

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(18px); }
.no-motion .reveal { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .topbar__nav { display: none; }
  .manifesto { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: 0; }
  .campus-row {
    grid-template-columns: 34px 1fr 20px;
    gap: 12px 10px;
    padding: 20px 6px;
  }
  .campus-row__district,
  .campus-row__courses { grid-column: 2 / 4; }
  .campus-row__district { order: 3; }
  .campus-row__courses { order: 4; }
  .campus-row:hover { padding-left: 6px; }
  .courses { grid-template-columns: 1fr; }
  .course { min-height: auto; }
  .meta-grid { grid-template-columns: 1fr; }
  .hero__meta { display: none; }
  .hero__title { line-height: 0.9; }
}

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

/* ---------- 合规公示 ---------- */
.compliance { padding: 0 var(--pad) clamp(56px, 7vw, 96px); }
.compliance__notice {
  font-size: 13px;
  line-height: 1.95;
  color: var(--gray);
  max-width: 64ch;
  border-left: 1px solid var(--signal);
  padding-left: 18px;
  margin-bottom: clamp(28px, 4vw, 44px);
}
.compliance__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.compliance__grid > div {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 20px 16px;
}
.compliance__grid dt {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--gray);
  text-transform: uppercase;
  margin-bottom: 9px;
}
.compliance__grid dd { font-size: 14px; letter-spacing: 0.1em; color: #cfcdc8; }

@media (max-width: 900px) {
  .compliance__grid { grid-template-columns: repeat(2, 1fr); }
}