/* ============================================================
   LAK · Refined Dark Luxury 主题
   设计取向：去噪 / 降饱和 / 轻字重 / 柔几何 / 克制用色
   ============================================================ */

:root {
  /* 底色：近纯黑，带一丝暖调（黑金质感基底） */
  --bg: #050505;
  --bg-soft: #0a0907;
  --bg-elev: #100d08;
  --bg-gold: rgba(216, 179, 106, 0.06);
  --bg-dark: rgba(0, 0, 0, 0.4);

  /* 文字：暖白，去掉冷蓝味 */
  --text: #f6f1e7;
  --muted: #a99e8a;
  --dim: #6f6757;

  /* 主色：金属金（黑金高级感核心），取代原冰蓝 */
  --neon: #d8b36a;
  --neon-600: #b8945a;
  --neon-dim: rgba(216, 179, 106, 0.12);
  /* 辅助色：暖白金，作为第二点缀 */
  --neon-2: #e8d9b8;
  --neon-2-dim: rgba(232, 217, 184, 0.10);
  --neon-3: #c9a85f;
  --neon-4: #8a7a52;

  --grad: linear-gradient(112deg, #d8b36a 0%, #e8d9b8 42%, #b8945a 100%);
  --grad-soft: linear-gradient(180deg, rgba(216, 179, 106, 0.05) 0%, rgba(5, 5, 5, 0) 100%);

  /* 线：极低对比，金色描边分层 */
  --line: rgba(216, 179, 106, 0.10);
  --line-strong: rgba(216, 179, 106, 0.20);

  /* 圆角：柔化是大面积高级感的关键 */
  --r-lg: 14px;
  --r-md: 10px;
  --r-sm: 7px;

  --glow-cyan: 0 0 24px rgba(216, 179, 106, 0.18);
  --glow-magenta: 0 0 24px rgba(232, 217, 184, 0.16);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.55), 0 18px 48px rgba(0, 0, 0, 0.42);
  --shadow-neon: 0 1px 0 rgba(216, 179, 106, 0.08) inset, 0 0 0 1px rgba(216, 179, 106, 0.06);

  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI Variable Display", "Segoe UI", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ---------- 背景：柔光 + 极淡网格 + 暗角，去掉扫描线 ---------- */

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1100px 620px at 78% -12%, rgba(216, 179, 106, 0.085), transparent 60%),
    radial-gradient(820px 520px at 4% 6%, rgba(212, 180, 131, 0.055), transparent 58%),
    radial-gradient(1000px 700px at 50% 112%, rgba(155, 142, 196, 0.055), transparent 62%),
    linear-gradient(rgba(255, 255, 255, 0.017) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.017) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 64px 64px, 64px 64px;
}

/* 暗角：让画面中心更聚焦，边缘自然收束 */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 42%, transparent 40%, rgba(0, 0, 0, 0.42) 100%);
}

#cyber-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.32;
}

.notice, .nav, main, footer { position: relative; z-index: 2; }

/* 字重策略：标题用细字重，靠字号与留白建立气场，而非靠粗体 */
h1, h2, h3 { letter-spacing: -0.022em; font-weight: 400; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(216, 179, 106, 0.26); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #050505; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.11); border-radius: 6px; border: 2px solid #050505; }
::-webkit-scrollbar-thumb:hover { background: rgba(216, 179, 106, 0.34); }

/* ---------------- 通告条 ---------------- */

.notice {
  background: rgba(255, 255, 255, 0.022);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
  font-family: var(--mono);
  text-align: center;
  padding: 9px 20px;
  letter-spacing: 0.04em;
}
.notice span { opacity: 0.82; }
.notice b { font-weight: 600; color: var(--text); letter-spacing: 0.06em; }

/* ---------------- 导航 ---------------- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(7, 8, 12, 0.72);
  backdrop-filter: saturate(140%) blur(20px);
  -webkit-backdrop-filter: saturate(140%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 18px 28px;
  display: flex; align-items: center; gap: 18px;
}
.brand { display: flex; align-items: center; gap: 13px; margin-right: auto; }
.brand .logo {
  width: 36px; height: 36px; border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-sm);
  background: #0a0907;
}
.brand strong {
  display: block; font-size: 16px; font-weight: 600; letter-spacing: 0.3em;
  color: var(--text);
}
.brand em {
  font-style: normal; font-size: 10px; color: var(--dim);
  letter-spacing: 0.16em; font-family: var(--mono); text-transform: uppercase;
}

.nav nav { display: flex; gap: 4px; }
.nav nav a {
  padding: 8px 14px; border-radius: var(--r-sm); font-size: 13px;
  color: var(--muted); font-weight: 500; letter-spacing: 0.02em;
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
  border: 1px solid transparent;
}
.nav nav a:hover {
  color: var(--text); background: rgba(255, 255, 255, 0.045);
  border-color: var(--line);
}

/* ---------------- 按钮 ---------------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  padding: 12px 24px; font-size: 13px; font-weight: 600;
  letter-spacing: 0.06em;
  cursor: pointer; white-space: nowrap; position: relative; overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
              background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.btn::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 34%, rgba(255, 255, 255, 0.14) 50%, transparent 66%);
  transform: translateX(-120%); transition: transform 0.7s var(--ease);
}
.btn:hover::after { transform: translateX(120%); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(120deg, #a8dcea, #cbd8e6);
  color: #0b0a07; border-color: transparent;
  box-shadow: 0 2px 10px rgba(216, 179, 106, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
.btn-primary:hover {
  box-shadow: 0 6px 22px rgba(216, 179, 106, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.6);
}
.btn-ghost {
  background: transparent; color: var(--text);
  border-color: var(--line-strong);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(212, 180, 131, 0.42);
  color: #fff;
}

main { max-width: var(--maxw); margin: 0 auto; padding: 0 28px 96px; }

/* ---------------- Hero ---------------- */

.hero { position: relative; padding: 104px 0 84px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr); gap: 64px; align-items: center; }

.pill {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 6px 15px; border-radius: 100px;
  background: rgba(255, 255, 255, 0.035); color: var(--muted);
  border: 1px solid var(--line);
  font-size: 11.5px; font-weight: 500; letter-spacing: 0.14em;
  text-transform: uppercase;
}
.pill::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(216, 179, 106, 0.14);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.82); }
}

.hero h1 {
  font-size: clamp(38px, 5.6vw, 68px);
  line-height: 1.08; font-weight: 300; margin: 26px 0 22px;
  letter-spacing: -0.03em;
}
.grad {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { color: var(--muted); font-size: 16.5px; max-width: 600px; margin: 0; line-height: 1.85; }
.hero-actions { display: flex; gap: 12px; margin: 34px 0 44px; flex-wrap: wrap; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stats div {
  background: linear-gradient(168deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.012));
  border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 18px 16px; display: flex; flex-direction: column; gap: 4px;
  position: relative; overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.stats div:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.stats div::before {
  content: ''; position: absolute; top: 0; left: 14%; right: 14%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(216, 179, 106, 0.5), transparent);
}
.stats b {
  font-size: 21px; font-weight: 500; letter-spacing: -0.01em;
  color: var(--text); font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.stats span { font-size: 11.5px; color: var(--dim); line-height: 1.5; }

/* hero 侧卡 */
.hero-side { display: flex; justify-content: center; }
.hero-card {
  width: 100%; max-width: 420px;
  background: linear-gradient(168deg, rgba(20, 23, 30, 0.9), rgba(10, 12, 17, 0.86));
  border: 1px solid var(--line-strong); border-radius: var(--r-lg);
  padding: 30px; box-shadow: var(--shadow-md);
  position: relative;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
/* 顶部高光：金属质感的关键细节 */
.hero-card::before {
  content: ''; position: absolute; inset: 0; border-radius: var(--r-lg);
  pointer-events: none;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.09), transparent 38%);
}
.hero-card-top { display: flex; align-items: center; gap: 15px; }
.hero-logo {
  width: 74px; height: 74px; border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: radial-gradient(circle at 50% 38%, #1c1533, #0a0907 72%);
  box-shadow: var(--shadow-sm);
}
.hero-card-top strong {
  font-size: 19px; letter-spacing: 0.26em; display: block; color: #fff; font-weight: 500;
}
.hero-card-top em { font-style: normal; font-size: 11px; color: var(--dim); font-family: var(--mono); letter-spacing: 0.12em; }
.hero-lines { margin: 24px 0 22px; display: grid; gap: 2px; }
.hero-line {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
  padding: 13px 2px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 13px; font-family: var(--mono);
}
.hero-line:last-child { border-bottom: none; }
.hero-line span { color: var(--muted); }
.hero-line b { font-variant-numeric: tabular-nums; color: var(--text); font-weight: 500; }
.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chips span {
  font-size: 11px; padding: 5px 11px; border-radius: 100px;
  border: 1px solid var(--line); color: var(--muted);
  font-family: var(--mono); letter-spacing: 0.05em;
  transition: all 0.3s var(--ease);
}
.chips span:hover { color: var(--text); border-color: rgba(216, 179, 106, 0.36); background: rgba(216, 179, 106, 0.05); }

/* ---------------- 区块 ---------------- */

.panel { padding: 96px 0; border-top: 1px solid var(--line); scroll-margin-top: 92px; }
.panel:first-of-type { border-top: none; }
.panel.soft {
  background: var(--grad-soft);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  margin-top: 28px; padding: 68px 36px;
}
.panel h2 {
  font-size: clamp(26px, 3.4vw, 38px); font-weight: 400; margin: 0 0 12px;
  letter-spacing: -0.028em;
}
.panel h2::before {
  content: ''; display: block;
  width: 34px; height: 1px; margin-bottom: 20px;
  background: linear-gradient(90deg, var(--neon), transparent);
}
.sub { color: var(--muted); margin: 0 0 32px; font-size: 15.5px; max-width: 700px; }

.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------------- 卡片 ---------------- */

.card {
  background: linear-gradient(168deg, rgba(255, 255, 255, 0.032), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 22px; }
.card.mini { padding: 26px; display: flex; flex-direction: column; gap: 10px; }
.card.mini:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}
.card.mini .ico {
  width: 40px; height: 40px; border-radius: var(--r-sm); display: grid; place-items: center;
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line);
  font-size: 17px; margin-bottom: 6px;
}
.card.mini b { font-size: 16px; font-weight: 500; color: #fff; letter-spacing: -0.01em; }
.card.mini span { font-size: 13.5px; color: var(--muted); line-height: 1.7; }

/* ---------------- 表单 / 交互 ---------------- */

.row { display: flex; gap: 10px; margin-top: 12px; }
label {
  font-size: 11.5px; color: var(--dim); font-weight: 500;
  font-family: var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
}
input {
  flex: 1; min-width: 0;
  background: rgba(255, 255, 255, 0.028);
  border: 1px solid var(--line); border-radius: var(--r-sm);
  padding: 12px 15px; color: var(--text);
  font-family: var(--mono); font-size: 14px;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
input:focus {
  outline: none; border-color: rgba(216, 179, 106, 0.42);
  background: rgba(216, 179, 106, 0.04);
  box-shadow: 0 0 0 3px rgba(216, 179, 106, 0.08);
}
input::placeholder { color: #4a5162; }

.meta { margin-top: 14px; font-size: 13px; color: var(--muted); word-break: break-all; font-family: var(--mono); }
.bal { display: flex; flex-direction: column; gap: 2px; margin-bottom: 16px; }
.bal > span { font-size: 11.5px; color: var(--dim); font-family: var(--mono); letter-spacing: 0.12em; text-transform: uppercase; }
.bal strong {
  font-size: 32px; font-weight: 400; letter-spacing: -0.02em;
  font-family: var(--mono); font-variant-numeric: tabular-nums;
  color: #fff;
}
.bal em { font-style: normal; font-size: 12px; color: var(--muted); font-family: var(--mono); }
.msg { margin-top: 16px; font-size: 13px; min-height: 22px; color: var(--muted); word-break: break-all; font-family: var(--mono); }
.msg.err { color: #e08a9a; }
.msg.ok { color: var(--neon-4); }

/* ---------------- 表格 ---------------- */

.table {
  border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden;
  background: linear-gradient(168deg, rgba(255, 255, 255, 0.028), rgba(255, 255, 255, 0.008));
  box-shadow: var(--shadow-sm);
}
.tr {
  display: grid; grid-template-columns: 1.3fr 0.8fr 1fr 2fr; gap: 14px;
  padding: 15px 22px; font-size: 14px; align-items: center;
  position: relative; transition: background 0.3s var(--ease);
}
.tr + .tr { border-top: 1px solid rgba(255, 255, 255, 0.05); }
.tr:not(.head):hover { background: rgba(255, 255, 255, 0.028); }
.tr:not(.head):hover::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--neon), var(--neon-2));
}
.tr.head {
  color: var(--dim); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  background: rgba(255, 255, 255, 0.022); font-weight: 500; font-family: var(--mono);
}
.tr b {
  color: var(--text); font-variant-numeric: tabular-nums;
  font-family: var(--mono); font-weight: 500;
}
.tr span { color: var(--muted); }
.tr span:nth-child(4) { color: var(--dim); font-size: 13.5px; }
.roles-table .tr { grid-template-columns: 1.1fr 1.3fr 1.3fr; }
.roles-table .tr span:first-child { color: var(--neon-2); font-family: var(--mono); font-size: 12.5px; }

/* ---------------- FAQ ---------------- */

details {
  border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 17px 22px; background: rgba(255, 255, 255, 0.018);
  margin-bottom: 10px;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
details:hover { border-color: var(--line-strong); background: rgba(255, 255, 255, 0.032); }
details[open] {
  border-color: rgba(216, 179, 106, 0.22);
  background: rgba(216, 179, 106, 0.022);
}
summary {
  cursor: pointer; font-size: 15.5px; font-weight: 500; list-style: none;
  display: flex; justify-content: space-between; gap: 12px; color: #fff;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--dim); font-weight: 400; font-family: var(--mono); transition: color 0.3s var(--ease); }
details[open] summary::after { content: '–'; color: var(--neon-2); }
details p { color: var(--muted); font-size: 14px; margin: 14px 0 0; }
code {
  background: rgba(216, 179, 106, 0.07); color: var(--neon);
  padding: 2px 8px; border-radius: 5px; font-size: 12.5px;
  font-family: var(--mono); border: 1px solid rgba(216, 179, 106, 0.12);
}

/* ---------------- 页脚 ---------------- */

footer { border-top: 1px solid var(--line); background: rgba(5, 6, 9, 0.6); }
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 64px 28px 44px;
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.footer-brand .logo {
  width: 34px; height: 34px; border-radius: var(--r-sm);
  border: 1px solid var(--line-strong); background: #0a0907;
}
.footer-brand strong { letter-spacing: 0.26em; font-weight: 500; }
.footer-inner h4 {
  font-size: 11px; margin: 0 0 14px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--dim); font-family: var(--mono); font-weight: 500;
}
.footer-inner ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-inner ul a { font-size: 14px; color: var(--muted); transition: color 0.3s var(--ease); }
.footer-inner ul a:hover { color: var(--text); }
.footer-copy {
  max-width: var(--maxw); margin: 0 auto; padding: 20px 28px 40px;
  color: var(--dim); font-size: 12.5px; border-top: 1px solid var(--line);
  font-family: var(--mono);
}

/* ---------------- 响应式 ---------------- */

@media (max-width: 980px) {
  .nav nav { display: none; }
  .hero { padding: 68px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  main { padding: 0 18px 64px; }
  .nav-inner { padding: 14px 18px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .panel { padding: 68px 0; }
  .panel.soft { padding: 44px 20px; }
  .tr { grid-template-columns: 1fr 1fr; font-size: 13.5px; }
  .tr.head { display: none; }
  .tr span:nth-child(4) { grid-column: 1 / -1; }
  .roles-table .tr { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .row .btn { width: auto; }
  .footer-inner { grid-template-columns: 1fr; }
}

/* 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .pill::before { animation: none; }
  * { transition-duration: 0.01ms !important; }
}