/* ============================================================
   御剑仙缘 · 官网样式表
   结构：base（变量/重置/通用） → components → sections → responsive
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg:           #0b0a14;
  --bg-light:     #14102a;
  --bg-lighter:   #1c1638;
  --primary:      #7b2ff7;      /* 主色：仙紫 */
  --primary-deep: #4a0c9f;
  --accent:       #00f0ff;      /* 辅色：冰青霓虹 */
  --accent-warm:  #ff6ad5;      /* 点缀：霞粉 */
  --gold:         #ffd700;
  --text:         #e6e0f0;
  --text-dim:     #8a85a8;
  --text-faint:   #5e5878;

  --glass:        rgba(255, 255, 255, 0.06);
  --glass-strong: rgba(255, 255, 255, 0.10);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-strong: rgba(255, 255, 255, 0.28);

  --shadow-glow:  0 0 30px rgba(123, 47, 247, 0.35);
  --shadow-glow-c:0 0 30px rgba(0, 240, 255, 0.30);
  --radius:       16px;
  --radius-lg:    22px;

  --font-title: 'Orbitron', system-ui, sans-serif;
  --font-body:   'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --nav-height:   72px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 0.25s;
  --t-base: 0.4s;
  --t-slow: 0.7s;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
img, svg, video, canvas { display: block; max-width: 100%; }
h1, h2, h3, h4, .font-title { font-family: var(--font-title); letter-spacing: 0.06em; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
ul { list-style: none; }
::selection { background: rgba(0, 240, 255, 0.3); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- 环境光晕（固定底层） ---------- */
body::before {
  content: "";
  position: fixed; inset: -10% 0 auto auto;
  width: 60vw; height: 60vw;
  background: radial-gradient(circle at center, rgba(123, 47, 247, 0.16), transparent 62%);
  pointer-events: none; z-index: 0;
}
body::after {
  content: "";
  position: fixed; inset: auto auto -12% -8%;
  width: 56vw; height: 56vw;
  background: radial-gradient(circle at center, rgba(0, 240, 255, 0.11), transparent 62%);
  pointer-events: none; z-index: 0;
}

/* ---------- 布局工具 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.section-padding { padding: clamp(64px, 10vw, 112px) 0; }

/* ---------- 标题组 ---------- */
.section-header { text-align: center; margin-bottom: clamp(36px, 6vw, 60px); }
.section-header .eyebrow {
  color: var(--accent);
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.32em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 10px;
}
.section-header .eyebrow::before,
.section-header .eyebrow::after {
  content: ""; width: 28px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}
.section-header .eyebrow::after { background: linear-gradient(270deg, transparent, var(--accent)); }
.section-header h2 {
  font-size: clamp(28px, 5vw, 44px);
  margin-top: 14px;
  background: linear-gradient(135deg, #ffffff 30%, var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1.25;
}
.section-sub { color: var(--text-dim); max-width: 620px; margin: 16px auto 0; font-size: 15px; }

/* ---------- 玻璃拟态 ---------- */
.glass-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius);
  transition: transform var(--t-base) var(--ease),
              box-shadow var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease);
  will-change: transform;
}
.glass-card:hover {
  transform: translateY(-8px);
  border-color: rgba(123, 47, 247, 0.55);
  box-shadow: var(--shadow-glow), 0 16px 44px rgba(0, 0, 0, 0.55);
}

/* ---------- 按钮 ---------- */
.btn-primary,
.btn-secondary,
.btn-buy,
.btn-code,
.btn-discord {
  font-family: var(--font-title);
  font-size: 14px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 15px 36px; border-radius: 40px; cursor: pointer;
  transition: transform var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease),
              background var(--t-fast), color var(--t-fast),
              border-color var(--t-fast);
  white-space: nowrap; user-select: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  color: #fff; border: none; box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 44px rgba(123, 47, 247, 0.85); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text); border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  border-color: var(--accent); color: var(--accent);
  box-shadow: var(--shadow-glow-c); transform: translateY(-3px);
}
.btn-block { width: 100%; display: block; }

/* ---------- 滚动入场 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- 工具字色 ---------- */
.hl { color: var(--accent); }
small code {
  background: rgba(255,255,255,0.08); padding: 1px 6px; border-radius: 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; color: var(--accent);
}