/* ============================================================
   MIR4 启梦服 — 纯静态站点样式
   设计语言：纯黑底 / 荧光点缀 / 无渐变 / 无紫蓝
   主荧光色：青碧 #2dffb0   辅金：#d8b15a
   ============================================================ */

:root {
  --bg:           #000000;
  --bg-soft:      #0a0c0b;
  --panel:        #0e110f;
  --line:         #1c2420;
  --text:         #e6e9e6;
  --text-dim:     #8b948e;
  --neon:         #2dffb0;   /* 荧光青碧 */
  --neon-deep:    #12c98a;
  --gold:         #d8b15a;   /* 高端金 */
  --max:          1180px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC",
               "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

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

/* ---------- 背景层（纯色 + 噪点 + 雾，无渐变） ---------- */
.bg-layer { position: fixed; inset: 0; z-index: -1; background: var(--bg); }

.bg-grain {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(rgba(45, 255, 176, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: 0.5;
}

.bg-mist {
  position: absolute; inset: -20%;
  background:
    radial-gradient(closest-side, rgba(45,255,176,0.06), transparent) 18% 28% / 50% 50% no-repeat,
    radial-gradient(closest-side, rgba(216,177,90,0.05), transparent) 82% 72% / 45% 45% no-repeat;
  filter: blur(8px);
  animation: drift 22s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to   { transform: translate3d(2%, 2%, 0) scale(1.05); }
}

/* ---------- 荧光文字 ---------- */
.glow {
  color: var(--neon);
  text-shadow:
    0 0 6px rgba(45,255,176,0.55),
    0 0 18px rgba(45,255,176,0.35),
    0 0 38px rgba(45,255,176,0.18);
}
.glow-soft {
  color: var(--neon);
  text-shadow: 0 0 10px rgba(45,255,176,0.35);
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 56px);
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid var(--neon-deep);
  color: var(--neon);
  font-size: 22px; font-weight: 700;
  letter-spacing: 0;
  box-shadow: 0 0 14px rgba(45,255,176,0.25), inset 0 0 10px rgba(45,255,176,0.12);
}
.brand-mark.small { width: 30px; height: 30px; font-size: 16px; }
.brand-name { font-size: 17px; letter-spacing: 3px; color: var(--text); }

.nav { display: flex; gap: 30px; }
.nav a {
  color: var(--text-dim); font-size: 15px; letter-spacing: 1px;
  position: relative; padding: 4px 0; transition: color .25s;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 1px; background: var(--neon);
  box-shadow: 0 0 8px var(--neon); transition: width .25s;
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { width: 100%; }

.lang-switch { display: flex; align-items: center; gap: 8px; }
.lang-btn {
  background: none; border: none; cursor: pointer;
  color: var(--text-dim); font-size: 14px; letter-spacing: 1px;
  font-family: inherit; padding: 4px 6px; transition: color .2s, text-shadow .2s;
}
.lang-btn.is-active { color: var(--neon); text-shadow: 0 0 10px rgba(45,255,176,0.5); }
.lang-btn:hover { color: var(--text); }
.lang-sep { color: var(--line); }

/* ---------- 首屏 ---------- */
.hero {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(90px, 16vh, 180px) clamp(20px, 5vw, 56px) clamp(70px, 12vh, 130px);
  text-align: center;
}
.hero-kicker {
  color: var(--gold); letter-spacing: 8px; font-size: 14px;
  margin-bottom: 26px; text-transform: uppercase;
}
.hero-title {
  font-size: clamp(86px, 20vw, 220px);
  line-height: 1; font-weight: 800; letter-spacing: 10px;
  display: flex; justify-content: center; gap: clamp(10px, 4vw, 40px);
}
/* 中文「启 梦」保持间距；英文 DREAMSTART 收紧为一个整词 */
body.lang-en .hero-title { gap: 0; letter-spacing: 6px; }
.hero-title .glow { animation: pulse 3.4s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% {
    opacity: 1;
    text-shadow:
      0 0 6px rgba(45,255,176,0.65),
      0 0 18px rgba(45,255,176,0.45),
      0 0 40px rgba(45,255,176,0.28);
  }
  50% {
    opacity: .4;
    text-shadow:
      0 0 3px rgba(45,255,176,0.18),
      0 0 8px rgba(45,255,176,0.10);
  }
}
.hero-sub {
  margin-top: 30px; font-size: clamp(18px, 3vw, 26px);
  letter-spacing: 6px; color: var(--text);
}
.hero-desc {
  max-width: 640px; margin: 24px auto 0;
  color: var(--text-dim); font-size: 16px; letter-spacing: .5px;
}
.hero-actions { margin-top: 46px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 38px; font-size: 15px; letter-spacing: 3px;
  border: 1px solid transparent; cursor: pointer; transition: all .25s;
}
.btn-primary {
  color: #04130d; background: var(--neon); border-color: var(--neon);
  box-shadow: 0 0 18px rgba(45,255,176,0.4);
  font-weight: 700;
}
.btn-primary:hover { box-shadow: 0 0 28px rgba(45,255,176,0.7); transform: translateY(-2px); }
.btn-ghost { color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--neon); color: var(--neon); }

/* ---------- 通用区块 ---------- */
.section {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(60px, 11vh, 120px) clamp(20px, 5vw, 56px);
  border-top: 1px solid var(--line);
}
.section-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 48px; }
.section-index { color: var(--gold); font-size: 15px; letter-spacing: 3px; }
.section-title { font-size: clamp(26px, 4vw, 40px); letter-spacing: 6px; font-weight: 700; }

/* ---------- 缘起 ---------- */
.about-grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: center;
}
.about-text p { color: var(--text-dim); font-size: 17px; margin-bottom: 20px; }
.about-text p:last-child { margin-bottom: 0; }
.about-stats { list-style: none; display: grid; gap: 26px; }
.about-stats li {
  border: 1px solid var(--line); padding: 22px 26px;
  display: flex; align-items: baseline; justify-content: space-between;
  background: var(--panel);
}
.stat-num { font-size: 34px; font-weight: 800; letter-spacing: 1px; }
.stat-label { color: var(--text-dim); letter-spacing: 3px; font-size: 14px; }

/* ---------- 特色 ---------- */
.feature-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.feature-card {
  border: 1px solid var(--line); background: var(--panel);
  padding: 34px 26px; transition: border-color .25s, transform .25s;
}
.feature-card:hover { border-color: var(--neon-deep); transform: translateY(-4px); }
.feature-icon {
  width: 54px; height: 54px; margin-bottom: 22px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--neon-deep); color: var(--neon);
  font-size: 24px; font-weight: 700;
  box-shadow: inset 0 0 12px rgba(45,255,176,0.1);
}
.feature-card h3 { font-size: 19px; letter-spacing: 3px; margin-bottom: 12px; }
.feature-card p { color: var(--text-dim); font-size: 15px; }

/* ---------- 图鉴 ---------- */
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.gallery-item { border: 1px solid var(--line); background: var(--panel); }
.gallery-media {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-soft);
}
.gallery-media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gallery-ph {
  display: none; color: var(--text-dim); letter-spacing: 4px; font-size: 14px;
}
.gallery-media.is-empty { border: 1px dashed var(--line); }
.gallery-media.is-empty .gallery-ph { display: block; }
.gallery-item figcaption {
  padding: 16px 20px; color: var(--text); letter-spacing: 2px; font-size: 15px;
  border-top: 1px solid var(--line);
}

/* ---------- 联系方式 ---------- */
.section-contact { text-align: center; }
.section-contact .section-head { justify-content: center; }
.contact-lead { color: var(--text-dim); letter-spacing: 4px; font-size: 18px; margin-bottom: 50px; }
.contact-bigtext {
  display: inline-block;
  font-size: clamp(34px, 7vw, 76px);
  font-weight: 800; letter-spacing: 8px; line-height: 1.2;
  transition: text-shadow .25s, transform .25s;
}
.contact-bigtext:hover { transform: translateY(-2px); }

.contact-links {
  margin-top: 40px;
  display: flex; gap: 22px; justify-content: center; flex-wrap: wrap;
}
.contact-link {
  min-width: 150px;
  padding: 14px 40px; font-size: 17px; letter-spacing: 4px; font-weight: 600;
  border: 1px solid var(--line); color: var(--text);
  transition: all .25s;
}
.contact-link:hover {
  border-color: var(--neon); color: var(--neon);
  box-shadow: 0 0 18px rgba(45,255,176,0.35);
}

.contact-qq {
  margin-top: 34px; font-size: clamp(18px, 3vw, 30px);
  letter-spacing: 6px; font-weight: 600;
}

/* ---------- 页脚 ---------- */
.site-footer {
  text-align: center; padding: 50px 20px 60px;
  border-top: 1px solid var(--line);
  display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.site-footer p { color: var(--text-dim); letter-spacing: 2px; font-size: 14px; }
.footer-copy { color: var(--line); letter-spacing: 2px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .nav { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; }
  .brand-name { display: none; }
}