/* ============================================================
   LuminaStudio · 洞察暮光 —— 团队介绍页
   设计系统 · 「暮光 / Twilight」
   夜空 → 地平线的暖光：在变坏之前，先看见
   ============================================================ */

:root {
  /* 暮光色板 —— 夜空到地平线 */
  --ink:        #0a0b1e;   /* 夜空 · 页面最底 */
  --ink-2:      #0e1030;   /* 夜空过渡 */
  --midnight:   #141a3a;   /* 面板 */
  --panel:      #171d42;   /* 卡片 */
  --panel-2:    #1d2450;   /* 卡片内嵌 / hover */

  --violet:     #8b7cff;   /* AI 引擎 · 科技 */
  --violet-2:   #a89bff;
  --horizon:    #ff9d5c;   /* 地平线暖光 · Lumina 的光 */
  --ember:      #ff6f91;   /* 余晖玫瑰 · 人的温度 */
  --lumina:     #ffe0b3;   /* 微光高光 · 光 */
  --teal:       #4fd6c0;   /* 呼应产品端 */

  /* 风险三色（产品语言） */
  --red:   #ff5d73;
  --amber: #ffb648;
  --green: #37d693;

  /* 文本 */
  --t0: #f6f4ff;   /* 主标题 */
  --t1: #d6d3ee;   /* 正文 */
  --t2: #9a99c4;   /* 次要 */
  --t3: #6b6b98;   /* 弱化 */

  --line:      #272e5a;
  --line-soft: #ffffff12;

  --twilight: linear-gradient(105deg, var(--violet) 0%, var(--ember) 52%, var(--horizon) 100%);
  --twilight-soft: linear-gradient(105deg, #8b7cff26 0%, #ff6f9120 52%, #ff9d5c22 100%);

  --serif: "Fraunces", "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --sans:  -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC",
           "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono:  "IBM Plex Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;

  --maxw: 1120px;
  --r: 18px;
  --r-sm: 12px;

  --ease: cubic-bezier(.22,.61,.36,1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--t1);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img, svg { display: block; }

::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-thumb { background: #262c56; border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: #343c72; }
::-webkit-scrollbar-track { background: var(--ink); }

/* ------------------------------------------------------------
   通用排版 & 容器
   ------------------------------------------------------------ */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--horizon);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 1px;
  background: linear-gradient(90deg, var(--horizon), transparent);
}

.serif { font-family: var(--serif); }

.grad-text {
  background: var(--twilight);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

section { position: relative; }

.section-head { max-width: 680px; margin-bottom: 46px; }
.section-head h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(28px, 4.4vw, 44px);
  line-height: 1.14;
  color: var(--t0);
  letter-spacing: -.01em;
  margin: 16px 0 14px;
}
.section-head p { color: var(--t2); font-size: 16.5px; max-width: 620px; }

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  border: 0;
}

/* ------------------------------------------------------------
   导航
   ------------------------------------------------------------ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 28px;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, #0a0b1eef, #0a0b1e88 70%, transparent);
  transition: background .3s var(--ease), border-color .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: #0a0b1ef2; border-bottom-color: var(--line-soft); }
.nav__brand { display: flex; align-items: center; gap: 11px; font-weight: 600; color: var(--t0); }
.nav__mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--twilight);
  display: grid; place-items: center;
  box-shadow: 0 6px 20px -6px #8b7cff88;
}
.nav__mark svg { width: 18px; height: 18px; }
.nav__brand b { font-family: var(--serif); font-weight: 600; font-size: 17px; letter-spacing: .02em; }
.nav__brand span { font-family: var(--mono); font-size: 11px; color: var(--t2); letter-spacing: .12em; }
.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__links a {
  font-size: 14px; color: var(--t2); padding: 8px 14px; border-radius: 9px;
  transition: color .2s, background .2s;
}
.nav__links a:hover { color: var(--t0); background: #ffffff0a; }
.nav__cta {
  font-size: 13.5px; font-weight: 600; color: var(--ink) !important;
  background: var(--lumina);
  padding: 9px 16px !important; border-radius: 10px !important;
  display: inline-flex; align-items: center; gap: 7px;
  transition: transform .2s var(--ease), box-shadow .2s;
}
.nav__cta:hover { background: var(--lumina) !important; transform: translateY(-1px); box-shadow: 0 10px 26px -8px #ffe0b366; }
.nav__cta svg { width: 15px; height: 15px; }

/* ------------------------------------------------------------
   HERO —— 暮光地平线
   ------------------------------------------------------------ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 132px 0 60px;
  overflow: hidden;
}
/* 夜空 → 地平线渐层 */
.hero__sky {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(120% 78% at 78% 118%, #ff9d5c33 0%, #ff6f9118 26%, transparent 56%),
    radial-gradient(90% 60% at 12% 6%, #8b7cff26 0%, transparent 55%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 46%, #171235 100%);
}
/* 星点 */
.hero__stars { position: absolute; inset: 0; z-index: 0; opacity: .6; }
.hero__grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(#ffffff08 1px, transparent 1px),
    linear-gradient(90deg, #ffffff08 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(80% 60% at 50% 40%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(80% 60% at 50% 40%, #000 0%, transparent 78%);
  opacity: .5;
}

.hero .wrap { position: relative; z-index: 2; }
.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 54px;
  align-items: center;
}
.hero__eyebrow { margin-bottom: 26px; }

.hero__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(52px, 8.4vw, 104px);
  line-height: .96;
  letter-spacing: -.015em;
  color: var(--t0);
}
.hero__title .en {
  display: block;
  font-size: clamp(20px, 2.8vw, 30px);
  font-weight: 400;
  font-style: italic;
  letter-spacing: .04em;
  color: var(--t2);
  margin-top: 18px;
}
.hero__title .en b { font-style: normal; font-weight: 600; }
.hero__title .en b i { font-style: normal; }
.hero__title .en .grad-text { font-weight: 600; }

.hero__slogan {
  font-family: var(--serif);
  font-size: clamp(21px, 2.7vw, 27px);
  color: var(--t0);
  margin: 30px 0 18px;
  font-weight: 500;
}
.hero__slogan .mk { position: relative; white-space: nowrap; }
.hero__slogan .mk::after {
  content: ""; position: absolute; left: -2px; right: -2px; bottom: 4px; height: 10px;
  background: var(--twilight); opacity: .32; border-radius: 3px; z-index: -1;
}

/* 定位说明 */
.hero__pos {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 11px 18px 11px 14px;
  border: 1px solid var(--line);
  background: #ffffff07;
  border-radius: 14px;
  color: var(--t1);
  font-size: 15px;
  margin-bottom: 32px;
}
.hero__pos .tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  color: var(--horizon); border: 1px solid #ff9d5c44; border-radius: 7px;
  padding: 4px 8px; background: #ff9d5c14;
}
.hero__pos b { color: var(--t0); font-weight: 600; }

.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 15px; font-weight: 600;
  padding: 14px 24px; border-radius: 13px;
  transition: transform .2s var(--ease), box-shadow .25s, background .25s;
}
.btn svg { width: 17px; height: 17px; }
.btn--primary { background: var(--twilight); color: #fff; box-shadow: 0 14px 34px -12px #ff6f9188; }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -14px #ff6f91aa; }
.btn--ghost { border: 1px solid var(--line); color: var(--t1); background: #ffffff05; }
.btn--ghost:hover { border-color: var(--violet); color: var(--t0); transform: translateY(-2px); }

/* 信号面板 —— 签名可视化 */
.signal {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff0a, #ffffff03);
  padding: 22px 22px 18px;
  box-shadow: 0 30px 70px -30px #000, inset 0 1px 0 #ffffff10;
  backdrop-filter: blur(4px);
}
.signal__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.signal__head span { font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; color: var(--t2); text-transform: uppercase; }
.signal__legend { display: flex; gap: 14px; }
.signal__legend i { display: inline-flex; align-items: center; gap: 6px; font-style: normal; font-size: 11px; color: var(--t2); }
.signal__legend i::before { content: ""; width: 12px; height: 2px; border-radius: 2px; }
.signal__legend .l-ai::before { background: var(--violet); }
.signal__legend .l-rule::before { background: var(--horizon); border-top: 0; height: 0; border-top: 2px dashed var(--horizon); }
.signal svg { width: 100%; height: auto; }
.signal__foot {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line-soft);
  font-size: 12.5px; color: var(--t2); font-family: var(--mono);
}
.signal__foot b { color: var(--horizon); }

/* Hero 底部指标条 */
.hero__stats {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; margin-top: 64px;
  border: 1px solid var(--line); border-radius: var(--r); overflow: hidden;
  background: var(--line);
}
.hero__stats .st { background: var(--ink-2); padding: 22px 24px; }
.hero__stats .st b { font-family: var(--mono); font-size: 30px; color: var(--t0); display: block; letter-spacing: -.02em; }
.hero__stats .st b em { font-style: normal; font-size: 16px; color: var(--horizon); }
.hero__stats .st span { font-size: 13px; color: var(--t2); }

/* ------------------------------------------------------------
   区块通用间距
   ------------------------------------------------------------ */
.band { padding: 108px 0; }
.band--alt { background:
    radial-gradient(70% 50% at 100% 0%, #8b7cff0e, transparent 60%),
    var(--ink-2); }

/* ------------------------------------------------------------
   痛点 · 现实
   ------------------------------------------------------------ */
.pain__grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 30px; align-items: start; }
.pain__cards { display: grid; gap: 16px; }
.pcard {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--panel); padding: 22px 24px;
  display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start;
  transition: border-color .25s, transform .25s var(--ease);
}
.pcard:hover { border-color: var(--violet); transform: translateX(4px); }
.pcard__n { font-family: var(--mono); font-size: 13px; color: var(--horizon); padding-top: 3px; }
.pcard h4 { font-size: 17px; color: var(--t0); margin-bottom: 4px; font-weight: 600; }
.pcard p { font-size: 14.5px; color: var(--t2); }

.evidence {
  border: 1px solid var(--line); border-radius: var(--r);
  background: linear-gradient(180deg, #ffffff07, transparent);
  padding: 26px;
}
.evidence__h { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.evidence__h b { color: var(--t0); font-size: 15px; }
.evidence__h .src { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--t3); }
.evidence__sub { font-size: 13px; color: var(--t2); margin-bottom: 20px; }
.bar { margin-bottom: 16px; }
.bar__top { display: flex; justify-content: space-between; font-size: 13.5px; margin-bottom: 7px; }
.bar__top span { color: var(--t1); }
.bar__top b { font-family: var(--mono); color: var(--horizon); }
.bar__track { height: 7px; border-radius: 99px; background: #ffffff10; overflow: hidden; }
.bar__fill { height: 100%; border-radius: 99px; background: var(--twilight); width: 0; transition: width 1.2s var(--ease); }

/* ------------------------------------------------------------
   项目介绍 · 双引擎
   ------------------------------------------------------------ */
.flow {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 56px;
}
.flow__step {
  border: 1px solid var(--line); border-radius: 14px; background: var(--panel);
  padding: 18px 16px; text-align: center; position: relative;
}
.flow__step .ico { width: 40px; height: 40px; margin: 0 auto 12px; border-radius: 11px;
  background: var(--twilight-soft); display: grid; place-items: center; }
.flow__step .ico svg { width: 20px; height: 20px; color: var(--lumina); }
.flow__step b { display: block; font-size: 14.5px; color: var(--t0); margin-bottom: 3px; }
.flow__step span { font-size: 12.5px; color: var(--t2); }
.flow__step:not(:last-child)::after {
  content: "→"; position: absolute; right: -11px; top: 50%; transform: translateY(-50%);
  color: var(--t3); z-index: 3; font-size: 15px;
}
.flow__tag {
  text-align: center; font-family: var(--mono); font-size: 12px; letter-spacing: .12em;
  color: var(--t2); margin-bottom: 26px;
}
.flow__tag b { color: var(--horizon); }

.engines { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.engine {
  border: 1px solid var(--line); border-radius: var(--r); padding: 28px;
  background: var(--panel); position: relative; overflow: hidden;
}
.engine::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
}
.engine--rule::before { background: linear-gradient(90deg, var(--horizon), transparent); }
.engine--ai::before { background: linear-gradient(90deg, var(--violet), transparent); }
.engine__ico { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 18px; }
.engine--rule .engine__ico { background: #ff9d5c1c; color: var(--horizon); }
.engine--ai .engine__ico { background: #8b7cff1c; color: var(--violet-2); }
.engine__ico svg { width: 24px; height: 24px; }
.engine h3 { font-family: var(--serif); font-weight: 600; font-size: 21px; color: var(--t0); margin-bottom: 6px; }
.engine .role { font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--t2); margin-bottom: 14px; }
.engine p { font-size: 14.5px; color: var(--t2); margin-bottom: 16px; }
.engine ul { list-style: none; display: grid; gap: 9px; }
.engine li { font-size: 14px; color: var(--t1); display: flex; gap: 10px; align-items: flex-start; }
.engine li::before { content: ""; width: 6px; height: 6px; border-radius: 99px; margin-top: 9px; flex: none; }
.engine--rule li::before { background: var(--horizon); }
.engine--ai li::before { background: var(--violet); }

.triage {
  border: 1px solid var(--line); border-radius: var(--r);
  background: linear-gradient(180deg, #ffffff06, transparent);
  padding: 22px 26px; display: grid; grid-template-columns: auto 1fr; gap: 26px; align-items: center;
}
.triage__label { }
.triage__label b { display: block; color: var(--t0); font-size: 15px; margin-bottom: 3px; }
.triage__label span { font-size: 12.5px; color: var(--t2); }
.triage__chips { display: flex; gap: 12px; flex-wrap: wrap; }
.chip {
  display: inline-flex; align-items: center; gap: 9px; padding: 9px 16px; border-radius: 99px;
  font-size: 14px; font-weight: 600; border: 1px solid;
}
.chip i { width: 9px; height: 9px; border-radius: 99px; }
.chip--red { color: var(--red); border-color: #ff5d7340; background: #ff5d7314; }
.chip--red i { background: var(--red); }
.chip--amber { color: var(--amber); border-color: #ffb64840; background: #ffb64814; }
.chip--amber i { background: var(--amber); }
.chip--green { color: var(--green); border-color: #37d69340; background: #37d69314; }
.chip--green i { background: var(--green); }

/* 三层架构 */
.layers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 20px; }
.layer { border: 1px solid var(--line); border-radius: var(--r-sm); background: var(--panel); padding: 20px 22px; }
.layer .lk { font-family: var(--mono); font-size: 11px; color: var(--horizon); letter-spacing: .12em; }
.layer b { display: block; color: var(--t0); font-size: 16px; margin: 8px 0 5px; }
.layer p { font-size: 13.5px; color: var(--t2); }

/* ------------------------------------------------------------
   团队成员
   ------------------------------------------------------------ */
.team__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.member {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--panel); padding: 26px 24px; position: relative;
  transition: transform .3s var(--ease), border-color .3s, box-shadow .3s;
}
.member:hover { transform: translateY(-6px); border-color: var(--violet); box-shadow: 0 24px 50px -26px #8b7cff77; }
.member__lead {
  position: absolute; top: 18px; right: 18px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
  color: var(--ink); background: var(--lumina);
  padding: 4px 9px; border-radius: 7px; font-weight: 700;
}
.member__av {
  width: 64px; height: 64px; border-radius: 18px; margin-bottom: 18px;
  display: grid; place-items: center;
  font-family: var(--serif); font-size: 27px; font-weight: 600; color: #fff;
  position: relative;
}
.member__av::after {
  content: ""; position: absolute; inset: 0; border-radius: 18px;
  box-shadow: inset 0 0 0 1px #ffffff2e;
}
.member:nth-child(1) .member__av { background: linear-gradient(135deg, #8b7cff, #ff6f91); }
.member:nth-child(2) .member__av { background: linear-gradient(135deg, #6f63d6, #4fd6c0); }
.member:nth-child(3) .member__av { background: linear-gradient(135deg, #ff9d5c, #ff6f91); }
.member:nth-child(4) .member__av { background: linear-gradient(135deg, #ff6f91, #8b7cff); }
.member h4 { font-size: 19px; color: var(--t0); font-weight: 600; }
.member .school { font-size: 12.5px; color: var(--t2); margin: 5px 0 16px; line-height: 1.5; min-height: 38px; }
.member__role {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em;
  color: var(--violet-2); border: 1px solid #8b7cff33; background: #8b7cff12;
  padding: 5px 11px; border-radius: 8px; margin-bottom: 14px;
}
.member p { font-size: 13.5px; color: var(--t2); line-height: 1.6; }
.member__skills { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.member__skills span {
  font-size: 11.5px; color: var(--t2); border: 1px solid var(--line);
  padding: 3px 9px; border-radius: 7px; background: #ffffff05;
}

/* ------------------------------------------------------------
   参赛目标
   ------------------------------------------------------------ */
.goals { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.goal {
  border: 1px solid var(--line); border-radius: var(--r); padding: 30px 30px 26px;
  background: var(--panel); position: relative; overflow: hidden;
}
.goal__term { display: flex; align-items: baseline; gap: 12px; margin-bottom: 20px; }
.goal__term .k { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; color: var(--horizon); text-transform: uppercase; }
.goal__term h3 { font-family: var(--serif); font-weight: 600; font-size: 24px; color: var(--t0); }
.goal ul { list-style: none; display: grid; gap: 14px; }
.goal li { display: flex; gap: 13px; font-size: 15px; color: var(--t1); align-items: flex-start; }
.goal li svg { width: 18px; height: 18px; color: var(--horizon); flex: none; margin-top: 3px; }
.goal--long li svg { color: var(--violet-2); }
.goal__milestones { display: flex; gap: 8px; margin-top: 22px; flex-wrap: wrap; }
.goal__milestones span {
  font-family: var(--mono); font-size: 11.5px; color: var(--t2);
  border: 1px solid var(--line); border-radius: 8px; padding: 5px 10px;
}
.goal__milestones span b { color: var(--horizon); }

/* ------------------------------------------------------------
   澳门特色 缎带
   ------------------------------------------------------------ */
.macau {
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--twilight-soft); padding: 34px 36px;
  display: grid; grid-template-columns: auto 1fr; gap: 32px; align-items: center;
}
.macau__lead b { font-family: var(--serif); font-size: 22px; color: var(--t0); display: block; }
.macau__lead span { font-size: 13px; color: var(--t2); font-family: var(--mono); letter-spacing: .1em; }
.macau__roles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.macau__roles .r { text-align: center; }
.macau__roles .r b { display: block; color: var(--t0); font-size: 16px; margin-bottom: 3px; }
.macau__roles .r span { font-size: 12px; color: var(--t2); }

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */
.footer { border-top: 1px solid var(--line); padding: 56px 0 40px; background: var(--ink-2); }
.footer__top { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; flex-wrap: wrap; }
.footer__brand b { font-family: var(--serif); font-size: 22px; color: var(--t0); }
.footer__brand p { color: var(--t2); font-size: 14px; margin-top: 8px; max-width: 340px; }
.footer__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.footer__meta { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line-soft);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--t3); font-family: var(--mono); }

/* ------------------------------------------------------------
   滚动揭示动画
   ------------------------------------------------------------ */
/* 默认可见；仅在 JS 可用时才先隐藏（无 JS/JS 失败也不会丢内容） */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }

/* 信号线绘制 */
.signal .draw { stroke-dasharray: 640; stroke-dashoffset: 640; }
.signal.in .draw { animation: draw 2.2s var(--ease) forwards; }
.signal .flare { opacity: 0; }
.signal.in .flare { animation: flare 1s ease .9s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes flare { 0%{opacity:0; transform:scale(.4);} 60%{opacity:1;} 100%{opacity:1; transform:scale(1);} }

.twinkle { animation: twinkle 3.5s ease-in-out infinite; }
@keyframes twinkle { 0%,100%{opacity:.25;} 50%{opacity:.9;} }

/* ------------------------------------------------------------
   响应式
   ------------------------------------------------------------ */
@media (max-width: 940px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .signal { max-width: 460px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .pain__grid { grid-template-columns: 1fr; }
  .engines { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow__step:not(:last-child)::after { display: none; }
  .team__grid { grid-template-columns: repeat(2, 1fr); }
  .goals { grid-template-columns: 1fr; }
  .layers { grid-template-columns: 1fr; }
  .macau { grid-template-columns: 1fr; gap: 20px; }
  .macau__roles { grid-template-columns: repeat(2, 1fr); }
  .triage { grid-template-columns: 1fr; gap: 16px; }
}
@media (max-width: 620px) {
  body { font-size: 15px; }
  .wrap { padding: 0 20px; }
  .nav__links a:not(.nav__cta) { display: none; }
  .band { padding: 76px 0; }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .team__grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .member .school { min-height: 0; }
  .hero__title .en { font-size: 17px; line-height: 1.4; }
  .hero__pos { align-items: flex-start; flex-wrap: wrap; }
  .hero__pos .tag { flex: none; }
}

/* 无障碍 · 减少动效 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .signal .draw { stroke-dashoffset: 0; }
  .signal .flare { opacity: 1; }
}
:focus-visible { outline: 2px solid var(--lumina); outline-offset: 3px; border-radius: 6px; }