/* =====================================================================
   硅基智能体 · 新生态  首页样式（2026-11-01 · 支持暗色主题）
   设计语言：浅色网格纸底 / 暗色终端底 + 翠绿信号色 + 等宽技术标签 + 细边框卡片
   ===================================================================== */

:root {
  color-scheme: light;

  --paper: #fafbf9;
  --paper-2: #f2f5f1;
  --ink: #0c1310;
  --ink-2: #46524c;
  --ink-3: #88938c;
  --line: #e3e8e2;
  --line-2: #d2dad3;
  --signal: #0fa36b;
  --signal-deep: #0a7d52;
  --signal-soft: #e9f7f0;
  --signal-line: #c9e9da;
  --grid: rgba(12, 19, 16, .045);
  --card: #ffffff;
  --nav-bg: rgba(255, 255, 255, .58);
  --nav-bg-solid: #fefffe;
  --nav-line: rgba(12, 19, 16, .10);
  --nav-hi: rgba(255, 255, 255, .85);
  --bar-a: #fbfcfa;
  --bar-b: #f5f8f4;
  --ticker-bg: rgba(255, 255, 255, .55);
  --solid-bg: #0c1310;
  --solid-bg-hover: #1a231e;
  --solid-fg: #ffffff;
  --feature-a: #f2fbf6;
  --feature-b: #ffffff;
  --glow: rgba(15, 163, 107, .07);
  --shadow-color: 12, 19, 16;
  --cta-a: #131c17;
  --cta-b: #0a0f0c;
  --cta-border: transparent;
  --warn-fg: #9a6a14;
  --warn-bg: #faf3e4;
  --warn-line: #ecd9b0;
  --sel: rgba(15, 163, 107, .18);

  --mono: "SF Mono", ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --sans: "Inter", "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --maxw: 1120px;
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --paper: #0a0f0c;
  --paper-2: #121a15;
  --ink: #e9f0ea;
  --ink-2: #a3b0a8;
  --ink-3: #6f7d75;
  --line: rgba(255, 255, 255, .10);
  --line-2: rgba(255, 255, 255, .18);
  --signal: #2fd08c;
  --signal-deep: #4ee0a4;
  --signal-soft: rgba(47, 208, 140, .12);
  --signal-line: rgba(47, 208, 140, .30);
  --grid: rgba(255, 255, 255, .045);
  --card: #111814;
  --nav-bg: rgba(18, 26, 21, .52);
  --nav-bg-solid: #111814;
  --nav-line: rgba(255, 255, 255, .13);
  --nav-hi: rgba(255, 255, 255, .07);
  --bar-a: #141d18;
  --bar-b: #101613;
  --ticker-bg: rgba(255, 255, 255, .03);
  --solid-bg: #e9f0ea;
  --solid-bg-hover: #ffffff;
  --solid-fg: #0a0f0c;
  --feature-a: #0f2019;
  --feature-b: #111814;
  --glow: rgba(47, 208, 140, .10);
  --shadow-color: 0, 0, 0;
  --cta-a: #0f1a14;
  --cta-b: #070b09;
  --cta-border: rgba(255, 255, 255, .08);
  --warn-fg: #e8b765;
  --warn-bg: rgba(232, 183, 101, .12);
  --warn-line: rgba(232, 183, 101, .30);
  --sel: rgba(47, 208, 140, .24);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: clip;
  background-color: var(--paper);
  background-image:
    radial-gradient(1100px 620px at 50% -8%, var(--glow), transparent 62%),
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: auto, 64px 64px, 64px 64px;
  background-repeat: no-repeat, repeat, repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--sel); }

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

.shell { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 14px 0;
}
/* 导航上方的极窄柔化带：挡住从胶囊上方缝隙里滑过的正文，不参与胶囊自身的毛玻璃 */
.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 22px;
  background: linear-gradient(to bottom, var(--paper) 62%, transparent);
  pointer-events: none;
  z-index: -1;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--nav-bg);
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  border: 1px solid var(--nav-line);
  border-radius: 999px;
  padding: .5rem .55rem .5rem 1.1rem;
  box-shadow:
    inset 0 1px 0 var(--nav-hi),
    0 1px 0 rgba(var(--shadow-color), .03),
    0 14px 34px -20px rgba(var(--shadow-color), .38);
}
/* 不支持 backdrop-filter 时退化为不透明底，保证可读 */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .nav { background: var(--nav-bg-solid); }
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-weight: 800;
  font-size: .95rem;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.logo-mark {
  position: relative;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: var(--ink);
  flex: none;
}
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--signal);
}
.logo-sep { color: var(--signal); }
.nav-links { display: flex; gap: .15rem; }
.nav-links a {
  font-size: .875rem;
  color: var(--ink-2);
  padding: .4rem .72rem;
  border-radius: 999px;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.nav-links a:hover { background: var(--paper-2); color: var(--ink); }
.nav-right { display: flex; align-items: center; gap: .45rem; }

/* ---------- 主题切换 ---------- */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-2); background: var(--paper-2); }
.theme-toggle:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-size: .9rem;
  font-weight: 650;
  line-height: 1;
  padding: .78rem 1.15rem;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: transform .15s, box-shadow .2s, background .2s, border-color .2s, color .2s;
  white-space: nowrap;
}
.btn-primary { background: var(--solid-bg); color: var(--solid-fg); }
.btn-primary:hover { background: var(--solid-bg-hover); transform: translateY(-1px); box-shadow: 0 10px 22px -10px rgba(var(--shadow-color), .45); }
.btn-ghost { background: var(--card); border-color: var(--line-2); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn-sm { padding: .5rem .85rem; font-size: .82rem; }
.btn-light { background: #fff; color: #0a0f0c; }
.btn-light:hover { transform: translateY(-1px); box-shadow: 0 12px 26px -12px rgba(0, 0, 0, .55); }

/* ---------- 首屏 ---------- */
.hero { padding-top: 2.4rem; padding-bottom: 3rem; }
.eyebrow {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--signal-deep);
  margin-bottom: 1rem;
}
.eyebrow.light { color: #5fe0a0; }
.hero h1 {
  font-size: clamp(2.6rem, 6.1vw, 4.5rem);
  line-height: 1.03;
  letter-spacing: -.038em;
  font-weight: 800;
}
.hero-accent {
  font-size: clamp(1.05rem, 2.1vw, 1.45rem);
  font-weight: 700;
  color: var(--signal);
  margin-top: 1.15rem;
  letter-spacing: -.01em;
}
.hero-lead {
  max-width: 35rem;
  color: var(--ink-2);
  font-size: 1.02rem;
  line-height: 1.85;
  margin-top: 1.1rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.9rem; }

/* ---------- 板块 ---------- */
.sec { padding: 3.2rem 0; border-top: 1px solid var(--line); scroll-margin-top: 92px; }
.sec:first-child { border-top: none; padding-top: .5rem; }
.sec-head { max-width: 46rem; margin-bottom: 2rem; }
.sec-head h2 {
  font-size: clamp(1.65rem, 3.4vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -.028em;
  line-height: 1.15;
}
.sec-lead { color: var(--ink-2); margin-top: .9rem; font-size: 1rem; line-height: 1.8; }
.sec-actions { margin-top: 1.2rem; }

.badge-soon {
  display: inline-block;
  vertical-align: middle;
  margin-left: .55rem;
  font-family: var(--mono);
  font-size: .62rem;
  font-weight: 650;
  letter-spacing: .06em;
  color: var(--warn-fg);
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  padding: .2rem .5rem;
  border-radius: 999px;
  transform: translateY(-.18em);
}

.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.tiles-one { grid-template-columns: 1fr; }
.tiles-one .tile { padding: 1.7rem 1.9rem; }
.tile {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.3rem 1.35rem;
  transition: transform .18s ease, box-shadow .22s ease, border-color .2s ease;
}
.tile:hover { transform: translateY(-3px); box-shadow: 0 18px 38px -26px rgba(var(--shadow-color), .38); border-color: var(--line-2); }
.tile-tag {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--signal-deep);
}
.tile h3 { display: flex; align-items: center; gap: .4rem; font-size: 1.05rem; font-weight: 750; margin: .55rem 0 .5rem; letter-spacing: -.01em; }
.tile p { color: var(--ink-2); font-size: .905rem; line-height: 1.75; }

.tile-feature {
  background: linear-gradient(180deg, var(--feature-a) 0%, var(--feature-b) 62%);
  border-color: var(--signal-line);
}
.tile-feature:hover { border-color: var(--signal); box-shadow: 0 20px 42px -26px rgba(15, 163, 107, .45); }
.tile-arrow { color: var(--signal); font-weight: 700; }
.tile-cta { margin-top: 1.1rem; font-family: var(--mono); font-size: .74rem; font-weight: 650; color: var(--signal-deep); letter-spacing: .02em; }
.tile-chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: 1rem; }
.tile-chips span {
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--ink-2);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .28rem .62rem;
}

/* ---------- 滚动条 ---------- */
.ticker {
  margin: 1.5rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: var(--ticker-bg);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track { display: flex; gap: .65rem; width: max-content; padding: .85rem 0; animation: marquee 40s linear infinite; }
.tick {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--ink-2);
  border: 1px dashed var(--line-2);
  border-radius: 999px;
  padding: .32rem .72rem;
  white-space: nowrap;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ---------- Craft CTA ---------- */
.cta-wrap { padding-top: 2rem; padding-bottom: 4.5rem; }
.cta {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  background: linear-gradient(140deg, var(--cta-a) 0%, var(--cta-b) 100%);
  border: 1px solid var(--cta-border);
  border-radius: 20px;
  padding: 2.7rem 2.8rem;
  color: #eaf1ec;
  box-shadow: 0 30px 60px -40px rgba(var(--shadow-color), .7);
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, .055) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.cta::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(15, 163, 107, .28), transparent 68%);
  pointer-events: none;
}
.cta-copy { position: relative; max-width: 36rem; }
.cta h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); font-weight: 800; letter-spacing: -.025em; color: #fff; line-height: 1.2; }
.cta-copy p:not(.eyebrow) { color: #a7b4ac; margin-top: .75rem; font-size: .95rem; line-height: 1.8; }
.cta .btn { position: relative; }

/* ---------- 页脚 ---------- */
footer { border-top: 1px solid var(--line); padding: 3rem 0 3.2rem; }
.foot-cols { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.f-brand { font-weight: 800; font-size: .95rem; margin-bottom: .35rem; }
footer p { color: var(--ink-3); font-size: .82rem; line-height: 1.7; max-width: 20rem; }
.f-title { font-family: var(--mono); font-size: .74rem; font-weight: 650; letter-spacing: .06em; color: var(--ink-2); margin-bottom: .55rem; }
footer ul { list-style: none; }
footer li { font-size: .82rem; color: var(--ink-3); line-height: 1.95; }
footer li a { color: var(--ink-2); transition: color .15s; }
footer li a:hover { color: var(--signal-deep); }
.copyright {
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  text-align: center;
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--ink-3);
}

/* ---------- 动效 ---------- */
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: no-preference) {
  .hero-copy > * { animation: rise .7s cubic-bezier(.2, .7, .2, 1) both; }
  .hero-copy > *:nth-child(2) { animation-delay: .04s; }
  .hero-copy > *:nth-child(3) { animation-delay: .09s; }
  .hero-copy > *:nth-child(4) { animation-delay: .14s; }
  .hero-copy > *:nth-child(5) { animation-delay: .19s; }
}
@media (prefers-reduced-motion: reduce) {
  .ticker-track { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 940px) {
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .tiles-one { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .shell { padding: 0 18px; }
  .nav-links { display: none; }
  .nav { padding: .45rem .45rem .45rem .9rem; }
  .logo { font-size: .88rem; }
  .nav .btn-sm { width: auto; }
  .hero { padding-top: 1.4rem; padding-bottom: 2.4rem; }
  .hero h1 { font-size: clamp(2rem, 9.5vw, 2.7rem); }
  .hero-actions .btn { flex: 1 1 100%; }
  .tiles { grid-template-columns: 1fr; }
  .sec { padding: 2.4rem 0; scroll-margin-top: 80px; }
  .tiles-one .tile { padding: 1.4rem 1.3rem; }
  .cta { padding: 2rem 1.5rem; }
  .cta .btn { width: 100%; }
  .foot-cols { flex-direction: column; gap: 1.6rem; }
}