/*
  熔剑炉 · 样式表
  设计关键词：简约 / 科技 / 武侠 / 少图像 / 高对比 / 响应式
*/

:root {
  --bg: #0b0f19;
  --bg-alt: #0e1424;
  --text: #e6ecff;
  --muted: #9aa4c7;
  --line: #1b2540;
  --card: #0f1527cc;
  --primary-1: #49f2ff;
  --primary-2: #7cff6b;
  --accent: linear-gradient(90deg, var(--primary-1), var(--primary-2));
  --shadow-1: 0 10px 30px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --space: clamp(16px, 1.2vw + 8px, 24px);
  --container: 1200px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, PingFang SC, Noto Sans CJK SC, Microsoft YaHei, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 24px 24px;
  opacity: 0.35;
  pointer-events: none;
  z-index: -2;
}
.bg-forge {
  position: fixed;
  inset: -20% -10% auto -10%;
  height: 65vh;
  background:
    radial-gradient(60% 80% at 50% 0%, rgba(76, 255, 206, 0.18), transparent 60%),
    radial-gradient(40% 60% at 60% 10%, rgba(73, 242, 255, 0.18), transparent 60%);
  filter: blur(30px) saturate(120%);
  pointer-events: none;
  z-index: -1;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 32px);
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(120%) blur(12px);
  background: color-mix(in oklab, transparent 70%, #0b0f19 30%);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.brand-mark { font-size: 20px; }
.brand-cn { font-size: 18px; }
.brand-en { font-size: 12px; color: var(--muted); opacity: 0.9; }

.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 10px;
  transition: color .2s ease, background-color .2s ease;
}
.nav-links a:hover { color: var(--text); background: #0f172a; }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  background: #0e1424aa;
  border-radius: 10px;
  align-items: center; justify-content: center; gap: 4px; flex-direction: column;
}
.nav-toggle span { width: 20px; height: 2px; background: var(--text); display: block; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 12px; text-decoration: none; border: 1px solid var(--line); color: var(--text); background: #0f1527; transition: transform .1s ease, background .2s ease, border-color .2s ease; }
.btn:hover { transform: translateY(-1px); border-color: #263356; }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--accent); color: #071016; border-color: transparent; box-shadow: 0 10px 30px rgba(88, 255, 200, 0.18); }
.btn-primary:hover { filter: saturate(115%); }
.btn-ghost { background: transparent; }

/* 英雄区 */
.section { padding-block: clamp(60px, 10vw, 120px); }
.hero {
  display: grid; place-items: center;
}
.hero-wrap {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(24px, 6vw, 64px);
}
.kicker {
  color: var(--primary-1); opacity: 0.85; letter-spacing: 2px; text-transform: uppercase; font-size: 12px; margin: 0 0 8px; }
.title {
  font-size: clamp(40px, 9vw, 96px);
  line-height: 1.05;
  margin: 0 0 8px;
  background: var(--accent);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  text-shadow: 0 0 18px rgba(76, 255, 206, 0.25);
}
.subtitle { font-size: clamp(16px, 2.5vw, 22px); color: var(--muted); margin: 0 0 10px; }
.lead { font-size: clamp(16px, 2.4vw, 20px); color: #c7d2fe; margin: 0 0 20px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0 10px; }
.badges { list-style: none; display: flex; gap: 10px; padding: 0; margin: 10px 0 0; flex-wrap: wrap; }
.badges li { padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: #0a1222; font-size: 12px; }

.hero-art { position: relative; display: grid; place-items: center; min-height: 420px; overflow: visible; }
.sword { width: min(48vw, 300px); height: auto; max-height: 72vh; filter: drop-shadow(0 12px 30px rgba(76, 255, 206, 0.18)) drop-shadow(0 0 44px rgba(124, 255, 107, 0.12)); animation: float 6s ease-in-out infinite; }
.orb { position: absolute; inset: auto auto -10px 50%; width: clamp(120px, 18vw, 200px); height: clamp(120px, 18vw, 200px); transform: translateX(-50%); border-radius: 50%; background: radial-gradient(circle at 30% 30%, rgba(73,242,255,.9), rgba(124,255,107,.6) 40%, transparent 60%); filter: blur(12px); opacity: .5; animation: pulse 6s ease-in-out infinite; pointer-events: none; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes pulse { 0%, 100% { transform: translateX(-50%) scale(1); opacity: .55; } 50% { transform: translateX(-50%) scale(1.06); opacity: .7; } }

/* 能力卡片 */
.section-title { font-size: clamp(28px, 4.5vw, 40px); margin: 0 0 6px; }
.section-sub { color: var(--muted); margin: 0 0 22px; }
.grid.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow-1); transition: border-color .2s ease, transform .12s ease; position: relative; overflow: hidden; }
.card::after { content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; background: var(--accent); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); mask-composite: exclude; opacity: 0; transition: opacity .2s ease; }
.card:hover { transform: translateY(-2px); }
.card:hover::after { opacity: .6; }
.card .icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; background: #0b1224; color: var(--primary-1); border: 1px solid var(--line); margin-bottom: 10px; }
.card h3 { margin: 6px 0 6px; font-size: 18px; }
.card p { margin: 0; color: #c7d2fe; }

/* 流程 */
.section.alt { background: linear-gradient(180deg, rgba(8,12,24,.6), rgba(8,12,24,.3)); border-block: 1px solid var(--line); }
.forge-steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; counter-reset: step; }
.forge-steps li { background: var(--card); border: 1px solid var(--line); padding: 16px; border-radius: var(--radius); position: relative; }
.forge-steps li .step { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; }
.forge-steps li .step::before { counter-increment: step; content: counters(step, "·", decimal-leading-zero); font-variant-numeric: tabular-nums; color: var(--primary-1); }
.forge-steps p { margin: 6px 0 0; color: #c7d2fe; }

/* 案例 */
.grid.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.case { background: conic-gradient(from 180deg at 50% 120%, rgba(124,255,107,.06), transparent 30%) , var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.case h3 { margin: 6px 0 6px; }
.case p { margin: 0 0 10px; color: #c7d2fe; }
.tag { display: inline-block; padding: 4px 10px; font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; margin-right: 6px; background: #0b1224; }

/* 关于 */
.about { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; align-items: start; }
.list { padding-left: 18px; color: #c7d2fe; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; text-align: center; }
.stat .num { display: block; font-size: clamp(20px, 4vw, 28px); background: var(--accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .label { color: var(--muted); font-size: 12px; }

/* 联系 */
.contact { max-width: 860px; }
.contact-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-1);
  position: relative;
}
.contact-card::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: var(--accent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: .25;
  pointer-events: none;
}
.contact-item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 12px;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(11,18,36,.5), rgba(11,18,36,.2));
  border: 1px solid #122042;
  transition: background .2s ease, border-color .2s ease, transform .12s ease;
}
.contact-item::before {
  content: "";
  position: absolute;
  left: 6px; top: 8px; bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: var(--accent);
  opacity: .45;
}
.contact-item:hover { transform: translateY(-1px); border-color: #1a2a4d; }
.contact-item:hover::before { opacity: .8; }
.ci-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #0a1222;
  color: var(--primary-1);
}
.ci-text { display: grid; gap: 2px; min-width: 0; }
.ci-label { font-size: 12px; color: var(--muted); }
.ci-value { color: var(--text); text-decoration: none; word-break: break-word; }
.ci-value:hover { text-decoration: none; }

/* 页脚 */
.site-footer { border-top: 1px solid var(--line); padding-block: 30px; background: #090e19; }
.footer-wrap { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; }
.footer-brand { color: var(--muted); }
.footer-links { display: flex; gap: 14px; justify-content: center; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-legal { color: #5d6687; text-align: right; font-size: 12px; }

/* 交互: reveal */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity .5s ease, transform .5s ease; }
.reveal.on { opacity: 1; transform: translateY(0); }

/* Toast */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: #0b1224f0; color: var(--text); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; z-index: 100; box-shadow: var(--shadow-1); }

/* 响应式 */
@media (max-width: 1024px) {
  .hero-wrap { grid-template-columns: 1fr; }
  .grid.features { grid-template-columns: repeat(2, 1fr); }
  .forge-steps { grid-template-columns: repeat(3, 1fr); }
  .about { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  .nav-links { position: absolute; top: 64px; right: 16px; left: 16px; background: #0c1224f2; border: 1px solid var(--line); border-radius: 14px; padding: 10px; display: none; flex-direction: column; gap: 6px; box-shadow: var(--shadow-1); }
  .nav-links.open { display: flex; }

  .grid.features { grid-template-columns: 1fr; }
  .grid.cases { grid-template-columns: 1fr; }
  .forge-steps { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-wrap { grid-template-columns: 1fr; text-align: center; }
  .footer-legal { text-align: center; }
}

@media (min-width: 720px) {
  .contact-card { grid-template-columns: 1fr 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}