/* ═══════════════════════════════════════════════════════════
   TITAN 计划 · 视觉系统
   深空 + 钻石切割 + 工程精密
   色彩/字体规范见 README §6
   ═══════════════════════════════════════════════════════════ */

:root {
  /* ─── 色彩（README §6.1） ─── */
  --bg:          #0A0E1A;   /* 深空黑 */
  --bg-2:        #10162A;   /* 次级背景 */
  --surface:     rgba(16, 22, 42, 0.62);
  --surface-2:   rgba(30, 39, 64, 0.38);
  --border:      #1E2740;
  --border-hi:   rgba(125, 211, 252, 0.40);

  --text:        #E8ECF5;   /* 主文字 */
  --text-2:      #8B96AE;   /* 次文字 */
  --text-3:      rgba(139, 150, 174, 0.55);

  --accent:      #7DD3FC;   /* 星辰银蓝 */
  --accent-2:    #00E5A0;   /* 电光青 */
  --warn:        #FFB020;   /* 琥珀 */
  --danger:      #FF4D4F;   /* 烈焰红 */

  --glow-accent: rgba(125, 211, 252, 0.16);
  --glow-mint:   rgba(0, 229, 160, 0.13);

  /* ─── 字体（README §6.2） ─── */
  --mono: 'JetBrains Mono', 'LXGW WenKai Mono', ui-monospace, monospace;
  --sans: 'LXGW WenKai Mono', 'JetBrains Mono', system-ui, -apple-system, sans-serif;

  /* ─── 布局 ─── */
  --max:    1180px;
  --nav-h:  60px;
  --gap:    clamp(1rem, 3vw, 2rem);
  --radius: 10px;
}

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

html { scroll-behavior: smooth; }

/* 连续背景：整页一条底色，各分区只叠加柔和光晕，互不硬切 */
body {
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 680px at 82% -6%,  var(--glow-accent), transparent 62%),
    radial-gradient(880px 560px at 8% 18%,    var(--glow-mint),   transparent 64%),
    radial-gradient(1000px 700px at 60% 108%, rgba(125, 211, 252, 0.09), transparent 66%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
ul { list-style: none; }

.mono { font-family: var(--mono); }
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 clamp(20px, 4vw, 40px); }

/* ═══ 顶部导航 ═══ */
.site-dock {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: clamp(12px, 3vw, 36px);
  padding: 0 clamp(16px, 4vw, 40px);
  background: linear-gradient(to bottom, rgba(10, 14, 26, 0.94), rgba(10, 14, 26, 0.72));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.site-dock__brand { display: flex; align-items: center; gap: 12px; color: var(--text); }
.site-dock__logo { height: 23px; width: auto; filter: invert(1) brightness(1.7); }
.site-dock__cn { color: var(--text-3); font-size: 0.75rem; letter-spacing: 0.18em; }

.site-dock__links { display: flex; gap: clamp(14px, 2.4vw, 28px); margin-left: auto; }
.site-dock__links a {
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  transition: color 220ms ease;
}
.site-dock__links a:hover { color: var(--accent); }

.site-dock__back {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  transition: border-color 220ms ease, color 220ms ease;
}
.site-dock__back:hover { border-color: var(--border-hi); color: var(--text); }

/* ═══ 通用分区壳 ═══
   相邻分区之间：无横线、无背景硬切。靠 body 连续底色 + 各自柔和光晕衔接。 */
.section { position: relative; padding: clamp(88px, 12vh, 152px) 0; }
.section__glow {
  position: absolute;
  inset: auto 0 0 0;
  height: 70%;
  pointer-events: none;
  z-index: -1;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  opacity: 0.82;
}
.section-title {
  margin-top: 10px;
  font-size: clamp(1.9rem, 4.6vw, 3.1rem);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-desc {
  margin-top: 14px;
  max-width: 62ch;
  color: var(--text-2);
  font-size: 0.95rem;
}

/* ═══ Hero ═══ */
#hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  overflow: hidden;
}
#starfield { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }

.hero-inner { position: relative; z-index: 1; text-align: center; }

.hero-mark {
  width: clamp(132px, 16vw, 188px);
  height: auto;
  margin: 0 auto 38px;
  filter: invert(1) brightness(1.75) drop-shadow(0 0 30px rgba(125, 211, 252, 0.28));
  animation: mark-in 1300ms cubic-bezier(0.16, 1, 0.3, 1) both;
}
.hero-wordmark {
  width: clamp(212px, 34vw, 336px);
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 0 26px rgba(125, 211, 252, 0.26));
  animation: mark-in 1300ms cubic-bezier(0.16, 1, 0.3, 1) 140ms both;
}
@keyframes mark-in {
  from { opacity: 0; transform: translateY(18px) scale(0.96); }
  to   { opacity: 1; transform: none; }
}

.hero-name { margin: 0; font-size: 0; line-height: 0; }
.hero-cn {
  margin-top: 24px;
  font-size: clamp(0.88rem, 2.1vw, 1.1rem);
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  color: var(--text-2);
}
.hero-slogan {
  margin-top: 26px;
  font-size: clamp(1rem, 2.6vw, 1.4rem);
  color: var(--text);
  letter-spacing: 0.04em;
}
.hero-slogan em {
  font-style: normal;
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 0.86em;
  letter-spacing: 0.06em;
}
.hero-lede {
  margin: 16px auto 0;
  max-width: 46ch;
  color: var(--text-2);
  font-size: 0.92rem;
}

.hero-actions { margin-top: 38px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  transition: border-color 240ms ease, background 240ms ease, transform 240ms ease;
}
.btn:hover { border-color: var(--border-hi); background: rgba(125, 211, 252, 0.09); transform: translateY(-2px); }
.btn--primary {
  border-color: rgba(0, 229, 160, 0.45);
  background: linear-gradient(135deg, rgba(0, 229, 160, 0.20), rgba(0, 229, 160, 0.06));
  color: #EAFFF8;
}
.btn--primary:hover { border-color: var(--accent-2); background: linear-gradient(135deg, rgba(0, 229, 160, 0.30), rgba(0, 229, 160, 0.10)); }
.btn__arrow { color: var(--accent); }

.hero-stats {
  margin: 56px auto 0;
  display: flex;
  gap: clamp(20px, 5vw, 58px);
  justify-content: center;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat__num {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 3.6vw, 2.1rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.hero-stat__label {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--text-3);
}

/* ═══ ASTRAIOS 旗舰 ═══ */
#astraios .section__glow {
  background: radial-gradient(760px 420px at 74% 46%, rgba(125, 211, 252, 0.10), transparent 66%);
}
.astraios-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  margin-top: 44px;
}
.astraios-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 44%, rgba(125, 211, 252, 0.14), transparent 62%),
    linear-gradient(150deg, rgba(16, 22, 42, 0.9), rgba(10, 14, 26, 0.6));
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}
.astraios-visual svg { width: 100%; height: 100%; display: block; }
.astraios-visual figcaption {
  position: absolute;
  right: 20px; bottom: 14px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--text-3);
}

.spec-list { margin-top: 28px; display: grid; gap: 2px; }
.spec {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(30, 39, 64, 0.55);
}
.spec:last-child { border-bottom: 0; }
.spec__k { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.1em; color: var(--text-3); }
.spec__v { font-size: 0.9rem; color: var(--text); }

/* ═══ 工具矩阵 ═══ */
#matrix .section__glow {
  background: radial-gradient(900px 460px at 20% 40%, rgba(0, 229, 160, 0.08), transparent 68%);
}
.domain-group { margin-top: 46px; }
.domain-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.domain-num {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--accent);
}
.domain-name { font-size: 1.05rem; font-weight: 700; letter-spacing: 0.06em; }
.domain-note { font-family: var(--mono); font-size: 0.72rem; color: var(--text-3); letter-spacing: 0.08em; }

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: 14px;
}

.tool-card {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 14px;
  padding: 20px 20px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 260ms ease, transform 260ms ease, background 260ms ease;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}
.tool-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--tool-accent, var(--accent)), transparent);
  opacity: 0;
  transition: opacity 260ms ease;
}
.tool-card:hover { border-color: var(--border-hi); background: rgba(22, 30, 52, 0.78); transform: translateY(-3px); }
.tool-card:hover::before { opacity: 1; }

.tool-card__top { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.tool-card__name {
  font-family: var(--mono);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text);
}
.tool-card__cn { font-size: 0.76rem; color: var(--text-3); letter-spacing: 0.1em; }
.tool-card__desc { font-size: 0.85rem; color: var(--text-2); line-height: 1.75; }
.tool-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
}
.tool-status { display: inline-flex; align-items: center; gap: 7px; }
.tool-status__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--st, var(--text-3));
  box-shadow: 0 0 12px var(--st, transparent);
}
.tool-status--live   { --st: var(--accent-2); color: var(--accent-2); }
.tool-status--wip    { --st: var(--accent);   color: var(--accent); }
.tool-status--plan   { --st: var(--danger);   color: rgba(255, 77, 79, 0.85); }
.tool-status--hold   { --st: #4A5670;         color: var(--text-3); }

/* ═══ 技术栈 ═══ */
#stack .section__glow {
  background: radial-gradient(900px 380px at 66% 34%, rgba(0, 229, 160, 0.07), transparent 68%);
}
.stack-rows { margin-top: 40px; display: grid; gap: 22px; }
.stack-row { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: 20px; align-items: baseline; }
.stack-row__k {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--text-3);
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--text-2);
  transition: border-color 220ms ease, color 220ms ease;
}
.chip:hover { border-color: var(--border-hi); color: var(--text); }

/* ═══ 路线图 ═══ */
#roadmap .section__glow {
  background: radial-gradient(860px 420px at 30% 40%, rgba(125, 211, 252, 0.08), transparent 68%);
}
.phase-list { margin-top: 44px; display: grid; gap: 4px; }
.phase {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr) minmax(0, 210px);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(30, 39, 64, 0.5);
  align-items: baseline;
  transition: background 220ms ease;
}
.phase:last-child { border-bottom: 0; }
.phase:hover { background: linear-gradient(90deg, rgba(125, 211, 252, 0.05), transparent 70%); }
.phase__id { font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.12em; color: var(--accent); }
.phase__goal { font-size: 0.9rem; }
.phase__tools { font-family: var(--mono); font-size: 0.72rem; color: var(--text-3); letter-spacing: 0.06em; }

/* ═══ 页脚（紧接上一分区，不加任何上边框） ═══ */
.site-foot {
  position: relative;
  padding: clamp(56px, 8vh, 88px) 0 40px;
}
.site-foot__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 28px;
  flex-wrap: wrap;
}
.site-foot__brand { display: flex; align-items: center; gap: 16px; }
.site-foot__logo { height: 23px; width: auto; filter: invert(1) brightness(1.5); opacity: 0.85; }
.site-foot__sub { font-family: var(--mono); font-size: 0.7rem; color: var(--text-3); letter-spacing: 0.1em; }
.site-foot__links { display: flex; gap: 18px; flex-wrap: wrap; font-family: var(--mono); font-size: 0.75rem; }
.site-foot__links a { color: var(--text-2); transition: color 200ms ease; }
.site-foot__links a:hover { color: var(--accent); }
.site-foot__beian {
  margin-top: 34px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-3);
}
.site-foot__beian a { color: var(--text-3); display: inline-flex; align-items: center; }
.site-foot__beian a:hover { color: var(--text-2); }
.site-foot__beian img { height: 15px; width: auto; margin-right: 5px; }

/* ═══ 响应式 ═══ */
@media (max-width: 1000px) {
  .astraios-grid { grid-template-columns: 1fr; }
  .astraios-visual { max-width: 560px; }
  .phase { grid-template-columns: 92px minmax(0, 1fr); }
  .phase__tools { grid-column: 2; }
}

@media (max-width: 720px) {
  .site-dock__cn, .site-dock__links { display: none; }
  .site-dock__back { margin-left: auto; }
  .stack-row { grid-template-columns: 1fr; gap: 8px; }
  .spec { grid-template-columns: 96px minmax(0, 1fr); }
  .site-foot__inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}