/* =========================================================
   双兔探月工坊 · LUNAR STEM WORKSHOP
   原生 CSS，无框架、无外部依赖
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  --ink: #071426;
  --ink-2: #0c1e36;
  --ink-3: #13294a;
  --blue: #1668ae;
  --blue-bright: #2e8bff;
  --blue-deep: #0f5c9e;
  --amber: #f5a623;
  --amber-soft: #ffd08a;
  --paper: #ffffff;
  --tint: #f2f7fd;
  --tint-2: #e8f1fb;
  --line: rgba(10, 32, 60, .1);
  --line-strong: rgba(10, 32, 60, .16);
  --text: #44576f;
  --text-soft: #5d7288;
  --text-light: #a9bdd4;
  --shell: 1180px;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow-sm: 0 2px 10px rgba(10, 32, 60, .05);
  --shadow: 0 16px 40px -22px rgba(10, 32, 60, .35);
  --shadow-lg: 0 30px 70px -30px rgba(10, 32, 60, .45);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 74px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei UI",
          "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono",
          "Roboto Mono", Consolas, monospace;
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: .005em;
}

p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; list-style: none; }
img { display: block; max-width: 100%; height: auto; }
[hidden] { display: none !important; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
strong { font-weight: 700; color: var(--ink); }
em { font-style: normal; }

:focus-visible {
  outline: 2px solid var(--blue-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: rgba(46, 139, 255, .22); color: var(--ink); }

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 通用排版件 ---------- */
.kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue);
}
.kicker span {
  color: var(--amber);
  font-weight: 700;
}
.kicker em {
  color: rgba(68, 87, 111, .55);
  font-style: normal;
}
.kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .45;
  flex: none;
}
.kicker-light { color: #8fc3ff; }
.kicker-light span { color: var(--amber); }
.kicker-light em { color: rgba(255, 255, 255, .45); }

.h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  letter-spacing: .01em;
}
.h3 {
  font-size: clamp(20px, 2.2vw, 26px);
  line-height: 1.4;
}
.lead {
  max-width: 620px;
  margin-top: 16px;
  font-size: clamp(15px, 1.3vw, 17px);
  color: var(--text);
}

.section {
  position: relative;
  padding-block: clamp(72px, 8.5vw, 126px);
  background: var(--paper);
}
.section-tint {
  background:
    radial-gradient(1200px 400px at 85% -10%, rgba(46, 139, 255, .07), transparent 70%),
    var(--tint);
  border-block: 1px solid var(--line);
}
.section-head { margin-bottom: clamp(36px, 4.6vw, 62px); }
.section-head .lead { margin-top: 14px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border: 0;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background-color .25s var(--ease), border-color .25s var(--ease);
  white-space: nowrap;
}
.btn svg { flex: none; transition: transform .25s var(--ease); }

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #1a6fbb, #2e8bff 70%);
  box-shadow: 0 12px 28px -12px rgba(46, 139, 255, .85),
              inset 0 1px 0 rgba(255, 255, 255, .25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px -12px rgba(46, 139, 255, .9),
              inset 0 1px 0 rgba(255, 255, 255, .3);
}
.btn-primary:hover svg { transform: translateX(3px); }

.btn-ghost {
  color: #eaf3ff;
  border: 1px solid rgba(255, 255, 255, .26);
  background: rgba(255, 255, 255, .04);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .45);
  transform: translateY(-2px);
}
.btn-block { width: 100%; }

/* ---------- 头部 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background-color .35s var(--ease), border-color .35s var(--ease),
              backdrop-filter .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck {
  background: rgba(6, 18, 33, .82);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: rgba(255, 255, 255, .1);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand-mark {
  width: 44px;
  height: 44px;
  flex: none;
  transition: transform .5s var(--ease);
}
.brand:hover .brand-mark { transform: rotate(-8deg) scale(1.04); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  color: #fff;
  font-size: 17px;
  letter-spacing: .06em;
  font-weight: 700;
}
.brand-text em {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .22em;
  color: rgba(255, 255, 255, .55);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav > a {
  position: relative;
  padding: 8px 14px;
  font-size: 14.5px;
  color: rgba(255, 255, 255, .74);
  border-radius: 999px;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.nav > a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 1.5px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav > a:hover { color: #fff; }
.nav > a:hover::after,
.nav > a.is-current::after { transform: scaleX(1); }
.nav > a.is-current { color: #fff; }

.nav-cta {
  margin-left: 10px;
  color: #06203a !important;
  background: #fff;
  font-weight: 600;
  box-shadow: 0 8px 22px -12px rgba(255, 255, 255, .8);
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--amber); color: #2b1800 !important; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 12px;
  background: rgba(255, 255, 255, .06);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: #fff;
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 100svh;
  padding-top: calc(var(--header-h) + clamp(40px, 7vw, 86px));
  padding-bottom: clamp(28px, 4vw, 48px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--ink);
  color: #d7e4f4;
}

.hero-bg { position: absolute; inset: 0; z-index: -1; }
#stars { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(680px 520px at 78% 22%, rgba(46, 139, 255, .3), transparent 68%),
    radial-gradient(520px 420px at 12% 88%, rgba(245, 166, 35, .13), transparent 70%),
    radial-gradient(900px 600px at 50% 120%, rgba(22, 104, 174, .32), transparent 72%);
}
.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(70% 60% at 50% 40%, #000 20%, transparent 85%);
  mask-image: radial-gradient(70% 60% at 50% 40%, #000 20%, transparent 85%);
  opacity: .8;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  padding-block: clamp(28px, 4vw, 56px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  padding: 7px 16px 7px 12px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 999px;
  background: rgba(255, 255, 255, .05);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: rgba(233, 243, 255, .82);
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #48e0a4;
  box-shadow: 0 0 0 0 rgba(72, 224, 164, .6);
  animation: pulse 2.6s infinite;
}
.eyebrow .sep { color: rgba(255, 255, 255, .35); }

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(72, 224, 164, .55); }
  70% { box-shadow: 0 0 0 8px rgba(72, 224, 164, 0); }
  100% { box-shadow: 0 0 0 0 rgba(72, 224, 164, 0); }
}

.hero h1 {
  margin-bottom: 22px;
  font-size: clamp(36px, 5.6vw, 68px);
  line-height: 1.16;
  letter-spacing: .01em;
  color: #fff;
  font-weight: 800;
}
.hero h1 .accent {
  position: relative;
  background: linear-gradient(100deg, #ffd08a 8%, var(--amber) 45%, #ffe6bd 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero h1 .accent::after {
  content: "";
  position: absolute;
  left: 2%;
  right: 2%;
  bottom: -8px;
  height: 6px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(245, 166, 35, .4), transparent);
  filter: blur(2px);
}

.hero-lead {
  max-width: 520px;
  font-size: clamp(15px, 1.35vw, 17.5px);
  line-height: 1.9;
  color: #b9cce2;
}
.hero-lead strong { color: #fff; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 30px;
}
.hero-tags li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(214, 231, 249, .72);
}
.hero-tags li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border: 1px solid rgba(46, 139, 255, .8);
  border-radius: 2px;
  transform: rotate(45deg);
}

/* Hero 视觉卡 */
.hero-visual { position: relative; display: flex; justify-content: center; }
.hero-card {
  position: relative;
  width: min(100%, 460px);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  padding: 26px 26px 58px;
  border-radius: 34px;
  border: 1px solid rgba(255, 255, 255, .6);
  background:
    radial-gradient(120% 100% at 50% 0%, #ffffff 0%, #eef5ff 55%, #dfebfa 100%);
  box-shadow:
    0 40px 90px -40px rgba(0, 30, 70, .9),
    inset 0 1px 0 rgba(255, 255, 255, .9);
}
.hero-card::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(160deg, rgba(255, 255, 255, .7), transparent 38%);
  -webkit-mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  mask-composite: exclude;
  pointer-events: none;
}
.mascot {
  width: 100%;
  max-width: 340px;
  filter: drop-shadow(0 18px 26px rgba(22, 104, 174, .16));
  animation: bob 7s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(22, 104, 174, .28);
  pointer-events: none;
}
.orbit-a {
  inset: 8%;
  animation: spin 34s linear infinite;
}
.orbit-b {
  inset: 20%;
  border-style: solid;
  border-color: rgba(245, 166, 35, .28);
  animation: spin 24s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hero-card-label {
  position: absolute;
  left: 26px;
  bottom: 20px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.hero-card-label span {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}
.hero-card-label em {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--blue);
  opacity: .7;
}

.float-chip {
  position: absolute;
  padding: 8px 14px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: #0b3157;
  background: rgba(255, 255, 255, .95);
  border: 1px solid rgba(22, 104, 174, .18);
  box-shadow: 0 12px 26px -14px rgba(0, 40, 90, .45);
  animation: bob 6s ease-in-out infinite;
}
.chip-1 { top: 9%; right: -12px; animation-delay: -1.4s; }
.chip-2 { bottom: 19%; left: -18px; animation-delay: -3.2s; }

/* Hero 底部数据条 */
.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: clamp(14px, 3vw, 34px);
  border-top: 1px solid rgba(255, 255, 255, .13);
}
.fact {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 22px 6px 0;
}
.fact + .fact { padding-left: 22px; border-left: 1px solid rgba(255, 255, 255, .1); }
.fact strong {
  font-family: var(--mono);
  font-size: clamp(30px, 3.4vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: #fff;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.fact strong .plus { font-size: .55em; color: var(--amber); vertical-align: super; }
.fact strong.fact-txt { font-family: var(--font); font-size: clamp(24px, 2.4vw, 30px); }
.fact span {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(190, 210, 232, .8);
}

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(28px, 4.5vw, 64px);
  align-items: start;
  margin-bottom: clamp(32px, 4vw, 56px);
}
.about-text .lead { margin-top: 0; color: var(--ink); font-size: clamp(17px, 1.5vw, 19px); }
.about-text > p + p { margin-top: 16px; }

.facts-list {
  display: grid;
  gap: 0;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}
.facts-list div {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.facts-list dt {
  flex: none;
  width: 82px;
  font-size: 13px;
  color: var(--text-soft);
}
.facts-list dd { font-size: 14.5px; color: var(--ink); font-weight: 600; }

.about-figure { margin: 0; }
.figure-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.figure-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 20, 38, .28), transparent 42%);
  pointer-events: none;
}
.figure-frame img {
  width: 100%;
  aspect-ratio: 4 / 3.1;
  object-fit: cover;
  transition: transform .9s var(--ease);
}
.about-figure:hover .figure-frame img { transform: scale(1.035); }
.about-figure figcaption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--text-soft);
}

/* ---------- 卡片网格 ---------- */
.card-grid {
  display: grid;
  gap: 18px;
}
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              border-color .35s var(--ease);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--blue-bright), var(--amber));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--ease);
}
.card:hover {
  transform: translateY(-5px);
  border-color: rgba(46, 139, 255, .35);
  box-shadow: var(--shadow);
}
.card:hover::before { transform: scaleX(1); }

.card-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  border-radius: 12px;
  color: var(--blue);
  background: var(--tint-2);
}
.card-icon svg { width: 24px; height: 24px; }

.card h3 {
  font-size: 17px;
  line-height: 1.5;
  margin-bottom: 10px;
}
.card p { font-size: 14px; line-height: 1.8; color: var(--text); }

.card-tall { padding-top: 30px; }
.card-num {
  display: block;
  margin-bottom: 46px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--blue);
  opacity: .6;
}
.card-note {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13px !important;
  color: var(--blue) !important;
  font-weight: 600;
}

/* ---------- 理念 band ---------- */
.band {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  min-height: clamp(340px, 32vw, 430px);
  padding-block: clamp(84px, 10vw, 132px);
  background: var(--ink-2);
  color: #d9e6f5;
}
.band-bg { position: absolute; inset: 0; }
.band-watermark {
  position: absolute;
  right: clamp(-50px, 1vw, 30px);
  top: 50%;
  width: clamp(200px, 24vw, 330px);
  height: auto;
  transform: translateY(-50%);
  opacity: .085;
  filter: brightness(2.4) saturate(1.4);
  pointer-events: none;
}
.band-line {
  position: absolute;
  left: -10%;
  right: -10%;
  top: 66%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46, 139, 255, .32), transparent);
}
.band-star {
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(46, 139, 255, .35), transparent);
}
.band-star.s1 { top: -30px; right: 8%; }
.band-star.s2 { bottom: -40px; left: 4%; background: radial-gradient(closest-side, rgba(245, 166, 35, .22), transparent); }

.band-inner { position: relative; text-align: center; }
.band-inner .kicker { justify-content: center; }
.band-quote {
  margin: 8px 0 18px;
  font-size: clamp(30px, 5.4vw, 64px);
  font-weight: 800;
  line-height: 1.22;
  color: #fff;
  letter-spacing: .01em;
}
.band-quote em {
  position: relative;
  color: var(--amber);
}
.band-quote em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .04em;
  height: .12em;
  background: rgba(245, 166, 35, .22);
  border-radius: 999px;
}
.band-sub {
  font-size: clamp(14px, 1.4vw, 16.5px);
  color: #9db6d2;
  letter-spacing: .04em;
}

/* ---------- 为什么 / 实力 ---------- */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.why-card {
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.why-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 12px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--blue-deep);
  background: var(--tint-2);
}
.why-card h3 { font-size: clamp(18px, 1.9vw, 21px); margin-bottom: 12px; }
.why-card p { font-size: 14.5px; color: var(--text); }

.why-figure {
  grid-column: 1 / -1;
  margin: 6px 0 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.why-figure img {
  width: 100%;
  aspect-ratio: 21 / 8;
  object-fit: cover;
  object-position: center 32%;
}

/* 课程来源面板 */
.system-box {
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: clamp(26px, 4vw, 54px);
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(28px, 3.6vw, 48px);
  border-radius: 26px;
  background:
    radial-gradient(600px 320px at 100% 0%, rgba(46, 139, 255, .28), transparent 70%),
    var(--ink);
  color: #c6d8ec;
  overflow: hidden;
}
.system-head .kicker { color: #8fc3ff; }
.system-head .kicker span { color: var(--amber); }
.system-head .kicker em { color: rgba(255, 255, 255, .4); }
.system-head .h3 { color: #fff; margin-bottom: 14px; }
.system-head p:last-child { font-size: 14.5px; color: #a9c1d9; }
.system-head { display: flex; flex-direction: column; }
.system-note {
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px dashed rgba(255, 255, 255, .16);
  font-family: var(--mono);
  font-size: 11.5px !important;
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .48) !important;
}

.system-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 24px;
  align-content: start;
}
.system-list li {
  padding: 13px 0 13px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
  position: relative;
}
.system-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 6px;
  height: 6px;
  border-radius: 2px;
  background: var(--blue-bright);
  transform: rotate(45deg);
}
.system-list strong {
  display: block;
  color: #fff;
  font-size: 14px;
  margin-bottom: 4px;
}
.system-list span { font-size: 13px; line-height: 1.7; color: #97b1cb; }

/* ---------- 三级课程 ---------- */
.path { margin-bottom: 26px; }
.path-track {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}
.path-track::before {
  content: "";
  position: absolute;
  left: 6%;
  right: 6%;
  top: 7px;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), var(--blue-bright));
  opacity: .35;
}
.path-track li {
  position: relative;
  padding-top: 24px;
  text-align: center;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-soft);
}
.path-track li::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 2px;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--blue-bright);
}
.path-track li:first-child::before { border-color: var(--amber); background: var(--amber); }
.path-track li:last-child::before { background: var(--blue-bright); }

.levels {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.level-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}
.level-tab {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px clamp(16px, 2.4vw, 30px);
  border: 0;
  background: #fff;
  text-align: left;
  cursor: pointer;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}
.level-tab:hover { background: var(--tint); }
.lt-id {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: rgba(22, 104, 174, .32);
  transition: color .3s var(--ease);
}
.lt-body { display: flex; flex-direction: column; line-height: 1.35; }
.lt-body strong { font-size: 16px; color: var(--ink); }
.lt-body em {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-soft);
}
.level-tab.is-active { background: var(--ink); }
.level-tab.is-active .lt-id { color: var(--amber); }
.level-tab.is-active .lt-body strong { color: #fff; }
.level-tab.is-active .lt-body em { color: rgba(255, 255, 255, .6); }

.level-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(0, .84fr);
  gap: clamp(24px, 3.6vw, 48px);
  padding: clamp(24px, 3.4vw, 42px);
  animation: panelIn .45s var(--ease);
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

.level-kicker {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--amber);
  margin-bottom: 12px;
}
.level-main h3 {
  font-size: clamp(20px, 2.3vw, 27px);
  line-height: 1.45;
  margin-bottom: 10px;
}
.level-desc { font-size: 14.5px; color: var(--text); }

.level-points {
  display: grid;
  gap: 0;
  margin-top: 24px;
  border-top: 1px solid var(--line);
}
.level-points li {
  padding: 16px 0 16px 22px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.level-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 24px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--blue);
  transform: rotate(45deg);
}
.level-points strong {
  display: block;
  font-size: 15px;
  margin-bottom: 5px;
}
.level-points span { font-size: 13.5px; line-height: 1.75; color: var(--text); display: block; }

.level-side { display: flex; flex-direction: column; gap: 16px; }
.level-shot {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--tint);
}
.level-shot img {
  width: 100%;
  aspect-ratio: 4 / 3.4;
  object-fit: cover;
}
.shot-tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: #fff;
  background: rgba(7, 20, 38, .72);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.level-result {
  padding: 18px 20px;
  border-radius: 16px;
  background: var(--tint);
  border: 1px solid var(--line);
}
.lr-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--blue);
  margin-bottom: 6px;
}
.lr-label:not(:first-child) { margin-top: 14px; }
.level-result p:not(.lr-label) { font-size: 13.5px; line-height: 1.75; color: var(--text); }

/* 适龄 + 教学法 */
.age-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  margin-top: clamp(42px, 5vw, 72px);
}
.age-col .h3, .teach-col .h3 { margin-bottom: 22px; }

.age-list { display: grid; gap: 12px; }
.age-list li {
  padding: 20px 22px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fff;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  align-items: baseline;
}
.age-grade {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ink);
  font-weight: 600;
  grid-row: span 1;
}
.age-list strong {
  color: var(--amber);
  font-size: 13px;
  letter-spacing: .04em;
  justify-self: start;
}
.age-list p {
  grid-column: 1 / -1;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text);
  margin-top: 4px;
}

.teach-list { display: grid; gap: 20px; }
.teach-list li { display: flex; gap: 16px; }
.teach-num {
  flex: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: #fff;
  background: var(--ink);
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  margin-top: 2px;
}
.teach-list strong { display: block; font-size: 15.5px; margin-bottom: 4px; }
.teach-list p { font-size: 13.5px; line-height: 1.75; color: var(--text); }

.teach-figure {
  margin: 26px 0 0;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--line);
}
.teach-figure img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }

/* ---------- 会员体系 ---------- */
.member-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.member-card {
  position: relative;
  padding: 26px 24px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #fbfdff);
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              border-color .35s var(--ease);
}
.member-card:hover {
  transform: translateY(-5px);
  border-color: rgba(46, 139, 255, .32);
  box-shadow: var(--shadow);
}
.mc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.mc-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: var(--blue);
  background: var(--tint-2);
}
.mc-icon svg { width: 22px; height: 22px; }
.mc-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--text-soft);
  opacity: .7;
}
.member-card h3 { font-size: 17px; margin-bottom: 10px; }
.member-card p { font-size: 13.8px; line-height: 1.8; color: var(--text); }

/* ---------- 成长之路 ---------- */
.growth-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.growth-card {
  padding: 28px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.growth-card:hover { border-color: rgba(46, 139, 255, .3); transform: translateY(-3px); }
.growth-card:first-child { grid-column: 1 / -1; }
.growth-card h3 {
  position: relative;
  padding-left: 18px;
  font-size: 18px;
  margin-bottom: 12px;
}
.growth-card h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--amber);
  transform: rotate(45deg);
}
.growth-card p { font-size: 14px; color: var(--text); }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.tag-list li {
  padding: 7px 13px;
  border-radius: 8px;
  font-size: 12.5px;
  color: var(--blue-deep);
  background: var(--tint-2);
  border: 1px solid rgba(22, 104, 174, .12);
}

.one-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  padding: 20px 26px;
  border-radius: 16px;
  border: 1px dashed rgba(22, 104, 174, .3);
  background: rgba(255, 255, 255, .7);
  font-size: clamp(14px, 1.4vw, 16px);
  color: var(--ink);
  font-weight: 600;
}
.one-line span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: #fff;
  background: var(--amber);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
}

/* ---------- 公益平台 ---------- */
.welfare-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(24px, 3.6vw, 44px);
  align-items: start;
}
.welfare-cards { display: grid; gap: 16px; }
.welfare-card {
  padding: 24px 26px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.welfare-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.welfare-card p { font-size: 13.8px; line-height: 1.8; color: var(--text); }

.split-card {
  padding: clamp(24px, 3vw, 34px);
  border-radius: 24px;
  background:
    radial-gradient(500px 280px at 100% 0%, rgba(46, 139, 255, .25), transparent 70%),
    var(--ink);
  color: #b7cde3;
  box-shadow: var(--shadow-lg);
}
.split-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
}
.split-title span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .5);
}
.split-bar {
  display: flex;
  gap: 6px;
  height: 12px;
  margin-bottom: 24px;
}
.split-half {
  display: block;
  width: var(--w);
  border-radius: 999px;
}
.h-kid { background: linear-gradient(90deg, var(--amber), #ffcf7a); }
.h-good { background: linear-gradient(90deg, #2e8bff, #6fb4ff); }

.split-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.split-item strong {
  display: block;
  font-family: var(--mono);
  font-size: 34px;
  line-height: 1;
  color: #fff;
  letter-spacing: -.02em;
}
.split-item strong em { font-size: .5em; color: var(--amber); margin-left: 2px; }
.split-item span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: #dce9f7;
}
.split-item small { display: block; font-size: 11.5px; color: rgba(255, 255, 255, .45); }

.split-foot {
  margin-top: 20px;
  font-size: 13.5px;
  line-height: 1.8;
  color: #c4d7ea;
}
.split-believe {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, .14);
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .5);
}

/* ---------- 工坊现场 ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 190px;
  gap: 14px;
}
.shot {
  position: relative;
  display: block;
  padding: 0;
  border: 0;
  border-radius: 16px;
  overflow: hidden;
  cursor: zoom-in;
  background: var(--ink-3);
  box-shadow: var(--shadow-sm);
}
.shot-wide {
  grid-column: span 2;
  grid-row: span 2;
}
.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .8s var(--ease), opacity .3s var(--ease);
}
.shot::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 20, 38, .68) 0%, rgba(7, 20, 38, .1) 55%, transparent 100%);
  opacity: .85;
  transition: opacity .35s var(--ease);
}
.shot:hover img { transform: scale(1.06); }
.shot:hover::after { opacity: 1; }
.shot-title {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  letter-spacing: .02em;
  transform: translateY(2px);
  transition: transform .35s var(--ease);
}
.shot:hover .shot-title { transform: none; }
.shot::before {
  content: "";
  position: absolute;
  z-index: 2;
  right: 14px;
  bottom: 16px;
  width: 22px;
  height: 22px;
  border: 1px solid rgba(255, 255, 255, .6);
  border-radius: 50%;
  opacity: 0;
  transition: opacity .3s var(--ease);
}
.shot:hover::before { opacity: 1; }

.gallery-note {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--text-soft);
}

/* ---------- 合作共赢 ---------- */
.coop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.coop-card {
  padding: 28px 26px 30px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #fafcff);
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), border-color .35s var(--ease);
}
.coop-card:hover { transform: translateY(-4px); border-color: rgba(245, 166, 35, .45); }
.coop-label {
  display: inline-block;
  margin-bottom: 14px;
  padding: 5px 12px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--amber);
  background: rgba(245, 166, 35, .1);
}
.coop-card h3 { font-size: 18px; margin-bottom: 16px; }
.coop-card ul { display: grid; gap: 10px; }
.coop-card li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}
.coop-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--blue);
  opacity: .7;
  transform: rotate(45deg);
}

.coop-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  margin-top: 22px;
  padding: clamp(24px, 3vw, 34px);
  border-radius: 20px;
  background: var(--tint);
  border: 1px solid var(--line);
}
.coop-cta h3 { font-size: clamp(18px, 2vw, 21px); margin-bottom: 6px; }
.coop-cta p { font-size: 14px; color: var(--text); }

/* ---------- 联系我们 ---------- */
.section-contact {
  background:
    radial-gradient(900px 500px at 80% 0%, rgba(46, 139, 255, .22), transparent 70%),
    radial-gradient(600px 400px at 0% 100%, rgba(245, 166, 35, .1), transparent 70%),
    var(--ink);
  color: #c6d8ec;
  border-top: 1px solid rgba(255, 255, 255, .06);
}
.section-contact .kicker { color: #8fc3ff; }
.section-contact .h2 { color: #fff; font-size: clamp(28px, 3.8vw, 46px); }
.section-contact .lead { color: #a9c1d9; }

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: clamp(34px, 5vw, 72px);
  align-items: start;
}

.contact-list {
  display: grid;
  gap: 0;
  margin-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.contact-list li {
  display: flex;
  align-items: baseline;
  gap: 22px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.ci-label {
  flex: none;
  width: 62px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .45);
}
.ci-value {
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 600;
  color: #fff;
  letter-spacing: .02em;
}
.ci-link {
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}
.ci-link:hover { color: var(--amber); border-bottom-color: rgba(245, 166, 35, .5); }

.contact-note {
  margin-top: 24px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(255, 255, 255, .42);
}

.contact-form {
  padding: clamp(24px, 3vw, 34px);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, .7);
  color: var(--text);
}
.form-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .02em;
}

.field { margin-bottom: 14px; }
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.field label {
  display: block;
  margin-bottom: 7px;
  font-size: 12.5px;
  color: var(--text-soft);
  letter-spacing: .02em;
}
.field label span { color: rgba(109, 130, 153, .6); }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--ink);
  background: #fbfdff;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease),
              background-color .25s var(--ease);
  appearance: none;
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%236d8299' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.field textarea { resize: vertical; min-height: 82px; }
.field input::placeholder,
.field textarea::placeholder { color: rgba(109, 130, 153, .55); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--blue-bright);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(46, 139, 255, .14);
}
.field.has-error input,
.field.has-error textarea { border-color: #e2584d; box-shadow: 0 0 0 3px rgba(226, 88, 77, .12); }

.contact-form .btn { margin-top: 6px; }
.form-hint {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-soft);
}
.form-hint.is-ok { color: #1e7d55; }
.form-hint.is-error { color: #c8443a; }
.form-legal {
  margin-top: 8px;
  font-size: 11.5px;
  color: rgba(109, 130, 153, .8);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #050f1e;
  color: #8fa6bd;
  padding-top: clamp(46px, 5vw, 68px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: clamp(26px, 4vw, 60px);
  padding-bottom: clamp(32px, 4vw, 48px);
}
.brand-footer { margin-bottom: 16px; }
.footer-brand p { font-size: 13.5px; line-height: 1.9; color: #7d94ac; }

.footer-nav { display: grid; gap: 10px; align-content: start; }
.footer-nav a,
.footer-contact a,
.footer-contact span { transition: color .25s var(--ease); }
.footer-nav a { font-size: 14px; color: #a2b8cd; }
.footer-nav a:hover { color: #fff; }

.footer-contact { display: grid; gap: 12px; align-content: start; }
.footer-contact p {
  display: flex;
  gap: 12px;
  font-size: 13.5px;
  color: #c2d4e6;
}
.footer-contact span {
  flex: none;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .35);
  padding-top: 3px;
}
.footer-contact a:hover { color: var(--amber); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-block: 20px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  font-size: 12px;
  color: rgba(255, 255, 255, .38);
}
.footer-core { font-family: var(--mono); letter-spacing: .1em; }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vw, 48px);
  background: rgba(4, 12, 24, .92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  animation: fadeIn .25s var(--ease);
}
.lightbox[hidden] { display: none; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.lb-figure {
  margin: 0;
  max-width: min(1100px, 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.lb-figure img {
  max-width: 100%;
  max-height: 76vh;
  width: auto;
  border-radius: 12px;
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, .9);
  animation: lbIn .35s var(--ease);
}
@keyframes lbIn { from { opacity: 0; transform: scale(.97); } to { opacity: 1; transform: none; } }
.lb-figure figcaption {
  font-size: 13.5px;
  color: rgba(255, 255, 255, .7);
  letter-spacing: .04em;
  text-align: center;
}

.lb-close,
.lb-nav {
  position: absolute;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
  color: #fff;
  cursor: pointer;
  transition: background-color .25s var(--ease), border-color .25s var(--ease),
              transform .25s var(--ease);
}
.lb-close:hover,
.lb-nav:hover { background: rgba(255, 255, 255, .18); border-color: rgba(255, 255, 255, .4); }
.lb-close { top: clamp(12px, 3vw, 28px); right: clamp(12px, 3vw, 28px); }
.lb-nav { top: 50%; margin-top: -23px; }
.lb-prev { left: clamp(8px, 2vw, 28px); }
.lb-next { right: clamp(8px, 2vw, 28px); }
.lb-nav:hover { transform: scale(1.06); }

/* ---------- 入场动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { gap: 34px; }
  .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .card-num { margin-bottom: 26px; }
  .member-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(3, 1fr); grid-auto-rows: 180px; }
  .system-box { grid-template-columns: 1fr; }
  .system-list { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 920px) {
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 40px); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .hero-card { width: min(78vw, 380px); }
  .mascot { max-width: 280px; }
  .hero-facts { grid-template-columns: 1fr 1fr; }
  .fact { padding: 18px 18px 6px 0; }
  .fact:nth-child(3) { padding-left: 0; border-left: 0; }
  .fact:nth-child(3),
  .fact:nth-child(4) { border-top: 1px solid rgba(255, 255, 255, .1); }
  .fact:nth-child(4) { padding-left: 18px; border-left: 1px solid rgba(255, 255, 255, .1); }

  .about-grid { grid-template-columns: 1fr; }
  .about-figure { order: -1; }

  .why-grid { grid-template-columns: 1fr; }
  .why-figure img { aspect-ratio: 16 / 9; }

  .level-panel { grid-template-columns: 1fr; }
  .level-side { flex-direction: column; }
  .level-shot img { aspect-ratio: 16 / 9; }

  .age-block { grid-template-columns: 1fr; }
  .growth-grid { grid-template-columns: 1fr; }
  .growth-card:first-child { grid-row: auto; }
  .welfare-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .coop-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  :root { --header-h: 66px; }
  .brand-text strong { font-size: 15.5px; }
  .brand-mark { width: 38px; height: 38px; }

  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 18px 22px;
    background: rgba(6, 18, 33, .97);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, .1);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
  }
  .nav.is-open { opacity: 1; transform: none; visibility: visible; }
  .nav > a { padding: 13px 12px; font-size: 16px; border-radius: 10px; }
  .nav > a::after { display: none; }
  .nav > a.is-current { background: rgba(255, 255, 255, .07); }
  .nav-cta { margin: 8px 0 0; text-align: center; padding: 13px !important; }

  .hero h1 { font-size: clamp(32px, 8.6vw, 44px); }
  .hero-card { width: min(84vw, 330px); padding: 20px 20px 50px; }
  .float-chip { font-size: 10px; padding: 7px 11px; }
  .chip-1 { right: -6px; }
  .chip-2 { left: -6px; }

  .card-grid-4 { grid-template-columns: 1fr; }
  .member-grid { grid-template-columns: 1fr; }
  .system-list { grid-template-columns: 1fr; }
  .card-num { margin-bottom: 16px; }
  .path-track { grid-template-columns: repeat(5, 1fr); }
  .path-track li { font-size: 11px; letter-spacing: .02em; }

  .level-tabs { grid-template-columns: 1fr; }
  .level-tab { padding: 14px 18px; }
  .lt-id { font-size: 20px; }

  .gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: 148px; gap: 10px; }
  .shot-wide { grid-column: span 2; grid-row: span 1; }
  .shot-title { font-size: 12.5px; left: 12px; bottom: 11px; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }

  .field-row { grid-template-columns: 1fr; }

  .band-quote { font-size: clamp(26px, 7.4vw, 36px); }
  .one-line { font-size: 14px; }
}

@media (max-width: 480px) {
  .shell { padding-inline: 18px; }
  .hero-facts { grid-template-columns: 1fr; }
  .fact { border-left: 0 !important; padding-left: 0 !important; border-top: 1px solid rgba(255,255,255,.1); }
  .fact:first-child { border-top: 0; }
  .gallery { grid-template-columns: 1fr 1fr; grid-auto-rows: 132px; }
  .shot-wide { grid-column: span 2; grid-row: span 2; }
  .btn { padding: 13px 20px; font-size: 14px; }
}

/* ---------- 偏好与打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

@media print {
  .site-header, .nav, .hero-bg, .lightbox, .contact-form, .site-footer { display: none !important; }
  body { color: #000; background: #fff; }
  .section, .band, .section-contact { background: #fff !important; color: #000 !important; padding-block: 24px; }
  .h2, h3, strong { color: #000 !important; }
}